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Windows cannot be installed to MBR/GPT disk? Windows cannot be installed to dynamic disk? These are the most common issues that can occur during the process of Windows 10/8/7 installation. This post shows how to address such issues with detailed steps given.

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When installing Windows OS (whether it is a clean install, reinstall or dual boot), you may receive various kinds of errors saying Windows cannot be installed to this disk. In this post, we will introduce 6 types of Windows installation errors as well as top corresponding solutions.

Error 1: Windows Cannot Be Installed to This Disk. The Selected Disk Is of the GPT Partition Style.

When installing Windows on a GPT disk, you may receive Windows cannot be installed on GPT disk error:

'Windows cannot be installed to this disk. The selected disk is of the GPT partition style.'

What causes this error?

Reasons

This is mainly because the motherboard supports Legacy BIOS only rather than both Legacy and UEFI or CSM boot. Under legacy BIOS mode, you can only install Windows to an MBR disk since traditional BIOS cannot recognize GPT partition, but data read/write on GPT disk is available as long as Windows supports it.

Solutions

To fix this error, firstly you need to enter BIOS Setup to see what the boot mode it is set to. Start/restart computer and continuously press a key to enter BIOS before the Windows logo appears. Different computers may require different keys, so you had better search 'how to enter BIOSplus computer trademark or motherboard name' on the internet to find the exact key.

In BIOS, if you find no signal showing you are using a UEFI motherboard like the following picture shows, maybe you are using a traditional motherboard which supports legacy BIOS boot only. Under this situation, the only solution is to convert the GPT disk to an MBR disk.

Here are the deals:

Solution 1. Convert GPT Disk to MBR if the Motherboard Supports Legacy BIOS Only

1) Use Partition Wizard

MiniTool Partition Wizard Free Edition is a free yet outstanding partitioning tool for Windows NON-SERVER users, which helps to convert GPT disk to MBR disk without losing data when an existing Windows is available. However, you should know that Partition Wizard can only change non-system GPT disk to MBR disk without bringing any data loss. This works for all Windows XP/Vista/7/8/10 users.

Step 1: run MiniTool Partition Wizard.

Launch MiniTool Partition Wizard. Then right-click on the target disk to be converted and choose 'Convert GPT Disk to MBR Disk'.

Step 2: confirm the conversion.

You will see the GPT attribute has turned to MBR. However, this is only pending operations for us to preview. Please press 'Apply' to confirm the change. After the conversion, you will find that all data is still there.

2) Use Diskpart

It is possible to make the conversion during the installation process. Please do the following:

Step 1: call out CMD.

Once the error pops up, click 'OK' to close the error and try pressing on 'Shift + F10' to call out CMD. If the utility does not emerge, please go back to the install Windows interface, then press 'Shift + F10' again to launch CMD.

Step 2: clean the disk and convert it to MBR.

Now you need to do a clean on the disk by typing the following commands:

'diskpart -> list disk -> select disk 1 (1 signifies the number of GPT disk) -> clean -> convert MBR.'

When diskpart shows it has successfully converted the selected disk to MBR format, you can exit from this program and continue to install Windows.

3) Use Disk Management Utility

If another Windows OS is available on the same computer, then Disk Management utility is helpful. Try these operations:

Step 1: go to Disk Management.

Start the working Windows and enter the built-in Disk Management tool by right clicking the 'Computer' icon on the desktop, choosing 'Manage', and selecting 'Disk Management'.

Step 2: delete volume.

Delete all partitions or volumes on the GPT disk one by one via the right-click function 'Delete Volume'.

Step 3: convert to MBR disk.

When the entire disk becomes an unallocated space, right click the GPT disk and choose 'Convert to MBR Disk'. After these steps, the original GPT disk will be converted to an MBR disk, and then you can go on installing Windows on this disk.

Solution 2. Change Boot Mode If the Motherboard Supports Both Legacy and UEFI Boot

Currently, most motherboards support both the Legacy boot and UEFI boot, and users can choose the most appropriate one manually. If you select Legacy only, it will be impossible to install Windows on GPT disk. At this time, you can enter BIOS and set the boot mode to CSM boot or choose Both.

Once the change has been made, please press on F10 to save changes, and then you can install Windows on a GPT disk.

Error 2: Windows Cannot Be Installed to This disk. The Selected Disk Has an MBR Partition Table.

When installing Windows 7, Windows 8 or other newly released Windows OS, you may receive another error saying Windows cannot be installed on MBR disk:

'Windows cannot be installed on this disk. The selected disk has an MBR partition table. On EFI systems, Windows can only installed on GPT disks'.

Why can't Windows be installed on an MBR disk under EFI systems?

Reasons

To answer this question, you need to know something about UEFI + GPT boot. Under EFI systems, theoretically both an MBR disk and GPT disk can be used to boot operating systems, but Microsoft rules Windows can only be installed on a GPT disk. To fix this error, the best way is to convert the MBR disk to a GPT disk.

Solutions

Convert MBR Disk to GPT Disk to Fix the Error

Steps are nearly the same as those to convert GPT disk to MBR disk, and the only difference is that you need to convert disk to GPT rather than MBR. For converting without data loss, please see Convert MBR Disk to GPT Disk for more details.

That's not all…In the former part, we have said most UEFI motherboards support both Legacy boot and UEFI boot but we can change it manually. If the error is caused by setting boot mode to be UEFI only, changing the mode to Both or CSM boot may fix the error, which has been introduced in Error 1.

Error 3: Windows Cannot Be Installed on Dynamic Disk.

When installing Windows on a dynamic disk, you may receive this message:

'Windows cannot be installed to this hard disk space. The partition contains one or more dynamic volumes that are not supported for installation'.

Reasons

Why can't Windows be installed on a dynamic disk? Let’s see what Microsoft Resource says.

'You can perform a fresh Windows installation on a dynamic volume only if that volume was converted from a basic volume and retained an entry in the partition table. Simple volumes converted from basic disks do not have an entry in the partition table unless they were system or boot volumes prior to conversion.'

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That is to say users can only install Windows to a dynamic volume which was a boot partition or system partition before converting to a dynamic disk. Under this situation, if you want to go on installing Windows, a good solution is to convert a dynamic disk to a basic disk.

Solutions

Convert Dynamic Disk to Basic Disk to Solve the Problem

1) Use MiniTool Partition Wizard

MiniTool Partition Wizard is a Windows based partitioning tool that can help revert a dynamic disk to basic without any data loss. Here are detailed steps:

Step 1: run Partition Wizard and choose the function for dynamic disk conversion.

Launch MiniTool Partition Wizard. Right click on the dynamic disk you want to convert and choose 'Convert Dynamic Disk to Basic Disk'.

Step 2: confirm operation.

You can have a preview that this dynamic disk will become a basic disk without data loss. At this time, press 'Apply' to finish this conversion.

2) Use Disk Management Utility

Go to Disk Management and then delete all the volumes that were introduced one by one, which has been introduced in Error 1. After these steps, the dynamic disk will become basic automatically. However, if there is no Windows OS available but you have a Windows installation CD or DVD, make use of Diskpart.

3) Employ Diskpart

Step 1: run cmd.

Boot computer via the installation disc and open CMD by pressing on 'Shift + F10'.

Step 2: delete volume in diskpart.

Type corresponding commands to delete all dynamic volumes one by one:

'diskpart -> list disk -> select disk N (N is the number of the dynamic disk) -> detail disk -> select volume=0 -> delete volume -> select volume=1 -> delete volume…'

Step 3: After all volumes on the dynamic disk are deleted, type 'convert basic'. Once Diskpart shows it has successfully converted the selected dynamic disk to basic, you can type 'exit' to quit from Diskpart.

Nevertheless, if you do not want to delete any volume because of important data, there is a lossless solution below.

Error 4: Windows Cannot Be Installed to This Disk. This Computer's Hardware May not Support Booting to This Disk.

Another error message you may receive during Windows installation is:

'Windows cannot be installed to this disk. This computer's hardware may not support booting to this disk. Ensure the disk's controller is enabled in the computer's BIOS menu.'

Reasons

Generally speaking, there are 2 possible reasons:

• Hard disk protection is enabled.
• SATA Controller mode was set incorrectly (with incorrect drive mode, the very disk cannot be used normally).

Solutions

Solution 1. Remove Hard Disk Protection

For the first situation, please read the specification or contact a sales person to confirm whether there is hard disk protection if the computer is not configured by ourselves. If there is, remove the protection by following the instructions.

Solution 2. Change SATA Controller Mode

For the second situation, if we changed SATA Controller mode in BIOS before, try setting BIOS to factory settings. Different BIOS gives different options to set itself to factory settings, like Restore Defaults, Load BIOS Defaults, and Load Optimal Defaults, so you should choose the correct one according to practical situations.

However, when this solution does not work, you must change the hard disk mode manually in BIOS. If the current state is IDE, change it to AHCI. If the current mode is AHCI, change it to IDE, etc. Actually, if Compatibility or Compatible is given, you must choose this mode.

Moreover, when you are installing the Data Center or Enterprise Server edition of Windows Server 2008/R2 or later to a raw disk via CD or DVD, you may get the same error. This is because the default SAN policy during setup on new installations of Data Center or Enterprise SKUs is Offline Shared, which applies Offline and Read Only attributes to any presented disks that are on a shared bus and not considered as System or Boot disks.

RAW disks cannot be detected as System or Boot, leading to offline and read only attributes. As a result, you cannot install Windows to these kinds of disks. To solve the problem, configure the default SAN policy to OnlineAll. For detailed steps, please see the corresponding Setup Reports Error of Microsoft.

Error 5: Windows Cannot Be Installed to This Disk. The Disk May Fail Soon.

Sometimes you may receive the following error message when installing Windows:

'Windows cannot be installed to this disk. The disk may fail soon. If other hard disks are available, install Windows to another location.'

Reasons

When this error appears, it indicates there may be something wrong with the hard disk.

Solutions

Backup and Repair/Replace the Hard drive

At this time, you must stop Windows installation, and then backup important data immediately in case of a real disk failure. If there is not so much data that is required to back up, just copy and paste them to a safe place. However, if you want to backup all or a large number of data on the disk, using a third party disk clone software to back up the entire hard disk can save you a lot of time.

When the backup is made, check the health state of the disk by running a diagnosis and repair tools which can be downloaded either from the hard disk manufacturer’s website or from a professional downloading center. If Windows won’t boot, please download the ISO file and burn it to a CD or DVD on another computer, and then make a disk diagnosis via the bootable disc.

If errors are detected from your hard disk but cannot be repaired, replace the dying hard disk with a new one. However, if it is under warranty, send it back to the manufacturers because they will repair the disk or give you a new one.

Error 6: Windows Cannot Be Installed to This Hard Disk Space, Windows Must Be Installed to a Partition Formatted in NTFS.

When installing Windows on an old disk, you may receive a Windows cannot be installed to this hard disk space message:

'Windows cannot be installed to the hard disk space. Windows must be installed to a partition formatted in NTFS.'

What causes this error?

Reasons

This is mainly caused by an incompatible file system of the partition to be installed with Windows. Microsoft rules that Windows must be installed to a partition formatted in NTFS since Windows Vista.

Solutions

Solution 1. Format the Partition with NTFS File System

1) Use MiniTool Partition Wizard

Remember Windows won't allow you to format the current boot partition no matter if you turn to Disk Management or CMD. If you have no operating system to use, formatting needs more effort. Thus, to make things easier, we strongly recommend using MiniTool Partition Wizard Bootable CD to cope with different situations with one solution. Please do the following:

Step 1: use Partition Wizard Bootable to boot your computer.

On the tool bar of each Partition Wizard paid editions, launch Bootable Media Builder to create a bootable CD/DVD disc or USB flash drive. Then set your computer to boot from the bootable media and finally enter MiniTool Partition Wizard Bootable.

Click on the partition to be formatted and select 'Format Partition' from the operations menu.

Step 3: choose NTFS as the desired file system.

In the pop-up window, choose NTFS at file system and then click 'OK' to continue.

Step 4: execute the operation.

Go back to the main interface and hit 'Apply' to execute this change.

2) Use Windows Installation Disk

Also you can choose to format the partition during the installation. When you see 'where do you want to install Windows', click on the target partition at first and then hit Drive Options (Advanced) to format it.

Solution 2. Clean the Whole Drive

Another solution for Windows should be installed to a partition formatted in NTFS is to clean the whole drive. You can also use MiniTool Partition Wizard Bootable CD to do this job (use Delete All Partitions), then Windows will make its partition automatically during installation.

Summary

If you receive one of the 6 errors during a Windows installation, I hope our solutions are useful for you. If they prove to be useful, please share to help more people. Should you have any doubts or problems, please feel free to leave us your comments in the following area or send to [email protected]. We will try our best to help you get out of trouble.

Summary: Still worry about your insufficient Mac storage? Want to speed up Mac but don't know how? Get the 6 free Mac cleaners to clear disk space, clean junk or duplicate files to free up your Mac.

Many of us know exactly how to clean Windows computer or Android phone, but when it comes to cleaning Mac, few people know about it. Many Apple users think that, there is no need to clean Mac.

However, with more and more junk files occupying your Mac storage, your Mac will slow down and offer a bad performance. You have to rely on some Mac cleaner software to remove all useless data.

Best Free Mac Cleaners

With so many Mac cleaner tools offered on the market, which one you should use? Do you know how to choose a great Mac cleaner? We have tested more than 20 Mac cleaners and select the 6 best ones for you to choose from. You can pick your preferred Free Mac cleaner to speed up your Mac easily and quickly.

No.1 Free Mac cleaner: CCleaner - Free junk file cleaner

CCleaner is one free and top Mac cleaner to delete cookies, search history, temporary files and junk files from Mac. The specific functions are below:

1. Find and remove useless/junk files with the click of a button so your Mac can run faster. Speed up boot times with easy management of Startup items.

2. Clear up your recycle bin, temporary files and folders, broken permissions and others. If you want to remove installed programs, just click one button.

3. Erase your browser search history and cookies so you can browse any Internet confidentially and your identity remains anonymous.

No.2 Free Mac cleaner: Disk Inventory X – Free disk cleaner for Mac

Disk Inventory X is one disk cleaning software and disk usage utility for Mac. With this free Mac cleaner, you can know where your disk space has gone and clean it safely. Just see more about Disk Inventory X.

1. Disk Inventory X shows the sizes of files and folders in a special graphical way.

2. With this Mac cleaner, you can see different files marked with different colors, to help you easily find what you want to delete.

No.3 Free Mac cleaner: AVG Cleaner – Free hidden clutter cleaner

AVG Cleaner is one free Mac cleaner to clean hidden clutter and forgotten duplicates. You can see the detailed information below:

1. Clear more hidden garbage, log, download history and trash bin for freeing up more space on your Mac.

2. Search more duplicate files, including images, music, videos and folders.

3. Created for Mac and easy to use.

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4. There is an anti-virus software called AVG AntiVirus for Mac, you can use it to protect Macs on your and your families.

No.4 Free Mac cleaner: OmniDiskSweeper - Free hard drive cleaner

OmniDiskSweeper is one free Mac cleaner to find and delete big files that taking up hard drive space and also it can help you recover lost disk space.

1. OmniDiskSweeper helps you sort every file on your Mac by size and you can identify the biggest file to delete it.

2. After deleting, remaining space and folders are recalculated.

No.5 Free Mac cleaner: Dr. Cleaner – Free memory, disk, system cleaner

Dr. Cleaner is one free Mac cleaning app to offer Memory Optimization, Disk Cleaning and System Monitoring to keep your Mac optimized for the best performance.

1. Smart and accurate selection for duplicates scan and remove on Mac with OS X 10.6.6 or later.

2. Scanned big files and junk files will be deleted easily from your Mac.

3. You can easily view real-time network usage and CPU usage in the Menu bar.

No.6 Free Mac cleaner: Disk Drill

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Disk Drill is one very popular free Mac cleaner app. Actually, it is a professional data recovery tool for Mac, which carries some disk cleaning functions. It has the capability to analyze Mac storage space, locate unused, large, and duplicate files and so on. In this way, it enables you to free up your Mac storage effortlessly.

1. Monitor the health of your Mac storage and offer timely alerts.

2. Find and remove duplicate files in multiple locations on Mac.

3. Analyze disk space, locate unused files and space hogs, free up storage.

Professional Mac cleaner recommendation:

With the best 6 Mac cleaner apps above, you can handily remove some junk files and optimize your Mac performance. But some of them only offer trial features. Here you are recommended to directly choose the professional Mac cleaner below:

• Scan and delete junk files including cache data and logs, email attachments, unwanted iTunes backup and app localization.
• Delete large and old documents and selectively remove worthless files.
• Clean duplicated files or folders on Mac.
• Uninstall apps and clean associated files safely.
• Monitor Mac system in disk utilization, battery status, memory performance and CPU usage.
• Compatible with iMac, Mac Pro, MacBook (Air/Pro) in the latest macOS Big Sur.

FAQs of Free Mac Cleaner

How do I clean and optimize my Mac?

Download and install Aiseesoft Mac Cleaner. Click Cleaner and you can clean up your Mac by cleaning system junk, iPhoto junk, email junk, similar photos, iTunes junk, trash bin, large & old files and more.

Why is my Mac so slow?

The reason that why is your Mac so slow may includes there is no enough hard drive or RAM on Mac. Or there is too many startup items or icon clutter on desktop. Perhaps your macOS is outdated and you should update it.

Does Catalina slow down your Mac?

No. Catalina won’t slow down an old Mac. You can check to make sure if your Mac is compatible with macOS Catalina.

By now, 6 free Mac cleaners have been shared here. You can choose your preferred Mac cleaner according to your need. Please share it in comment if you have any better Mac cleaner recommendation. Check ere if you want to speed up your slow iPhone.

Mac Disk Creator For Windows

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December 29, 2020 17:50 / Updated by Louisa White to Mac Cleanup