Cant install Windows after LINUX

Dear ДАНИЯЛ УМУРЗАКОВ!

Welcome to the Microsoft Community!

If you're trying to install Windows 11 on a disk that is formatted with Btrfs (B-Tree Filesystem), you will encounter issues because Windows does not natively support Btrfs. You need to format the disk to a filesystem that Windows recognizes, such as NTFS or FAT32, before you can install Windows.

Here are the steps you should follow to format your disk and install Windows 11:

Back Up Your Data

Before you proceed, make sure to back up all important data from the Btrfs-formatted disk to another storage device. Formatting will erase all data on the disk.

Create a Windows Installation Media

Download Windows 11 ISO: From a reliable source, download the Windows 11 ISO file.

Create a Bootable USB Drive: Use a tool like Rufus or the Media Creation Tool to create a bootable USB drive from the ISO file.

Change the Disk Format

There are a few ways to format the disk:

Option 1: From Linux

Open a terminal in Linux.

Use the umount command to unmount the disk you want to format:

sudo umount /dev/sdX

Replace sdX with the actual device name of your disk (not the partition).

Use the wipefs command to clear the partition table:

sudo wipefs --all /dev/sdX

Now, you can create a new partition table and partitions using fdisk or parted:

sudo fdisk /dev/sdX

Follow the prompts to create a new partition table (GPT or MBR) and then create a new partition.

Format the new partition with NTFS:

sudo mkfs.ntfs /dev/sdX1

Replace sdX1 with the actual partition name.

Option 2: From Windows PE

Boot from the Windows installation media you created earlier.

At the "Install Windows" screen, click "Repair your computer" or "Troubleshoot".

Go to "Advanced options" > "Command Prompt".

Use the diskpart command to manage your disk:

diskpart

list disk

select disk X

clean

create partition primary

format fs=ntfs quick

assign

exit

Replace X with the number of your disk.

Install Windows

After formatting the disk to NTFS, you should be able to proceed with the Windows installation as normal. Follow the on-screen instructions to install Windows 11.

If you're unable to format the disk from within Linux or Windows PE, you might need to use a third-party tool or a different computer to create a bootable disk formatting tool. Always ensure you have a backup of your data before attempting to format a disk.

In fact, if you don't want to bother, you can directly use an empty hard drive to install the Windows operating system using the Windows installation media.

Generally speaking, we install the Windows operating system first and then partition the system before trying to install the Linux system, because the UEFI format boot boot Windows is also compatible with Linux boot. I have also tried to use Windows and Linux dual systems before, in order to use Raspberry Pi to write a driver, but I used a computer with the original operating system as Windows, and then manually partitioned and installed the Linux system.

Because Windows needs to use the hard disk partition format as NTFS to install the operating system.

1. You need to use the tool to create a new NTFS primary partition (as the Windows system disk);
2. You need to make a Windows 11 installation disk, it is recommended to use the official Windows boot disk creation tool as mentioned above;
3. You need to make a Linux boot disk, because it may be impossible to enter Linux after Windows is installed (that is, the Linux system boot is missing or damaged), then you need to enter the Linux boot disk to repair the Linux boot.

Please note: When partitioning the system and installing a new system, please back up your important data.

I hope above information can help you. If you have any questions, please feel free to let me know. Tell me the results. I'm looking forward to hearing from you.

Thank you for your understanding and support! 

In this special season, I wish you all the best—may your holiday be merry and bright! Merry Christmas!

Best regards,

Yang.Z - MSFT | Microsoft Community Support Specialist

Hello,

If you can't install Windows because your hard drive/SSD isn't formatted as NTFS, then you will need to make a bootable Windows Installation Media. To do this, you will have to purchase a USB flash drive with at least 8GB of capacity. If you have another computer, download the Media Creation Tool (push here for Windows 10, and push here for Windows 11), and then run the exe once it downloads. If you get a UAC prompt, simply push Yes. Once the MCT comes up, insert your USB flash drive, choose your architecture, language, and time/currency format, make sure to push "USB Flash Drive", as this will move the files from the ISO to your flash drive. Let the MCT do its thing, and then eject the flash drive once it's done. On the non-functioning computer, boot from the USB flash drive, and then once the Windows Installer comes up, push "Install Now". When asked for a product key, if you have had Windows on the PC before, push "I don't have a product key". If you don't have one, you can buy one from the Microsoft Store. When asked which disk you want to install to, instead of formatting the entire drive, push the drive that has Linux on it and push "Create". Create a 64GB partition (enter 64000 in the text box) and push create. This will create a partition that you can use to install Windows. Let Windows install, and after it finishes installing, complete the OOBE (Out-of-Box-Experience), and then you should be on your way. If you don't have a second computer, ask a friend or family member. Make sure to select the right button when making a new partition, as selecting other buttons can lead to loss of data. Make sure to backup your data in advance so you can restore it even if something goes wrong.

Let me know how this goes, and if you have any questions, don't hesitate to ask! Merry Christmas, Happy Hanukkah, Happy Kwanzaa, and Happy New Year.