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I have used the Installation assistant used to upgrade my PC to Windows 11 from Windows 10.
However, this PC has been through a number of upgrades from Win XP pro, then Win 7 to Win 10 and now trying to install Win 11
During that time it was originally MBR disk (Win 7) then upgraded to an M2 drive running GPT for Win 10.
The original problem I encountered was that the install, would get to the boot screen and hang.
After fixing both the EFI and BcdBoot which showed errors, the upgrade now states that it cannot determine if I can run Win 11 with the error code 0x8007000 - 0x40008
The machine is capable, having been tested through the microsoft checking app.
The Windows 11 OS is the Win11_25H2_English_x64
I have tried absolutely everything suggested so far from many different sources.
Everything is turned off in startup files and all devices disconnected apart from mouse keyboard and monitor.
Addendum
EFI Partition size is 400GB and has been recreated.
My original thought was that when Windows 11 install hung at the startup screen, it looked as if it was trying to boot into Windows rather than going through the efi start.
This was because if I selected the windows to boot from, it looked exactly the same.
Which is why the EFI and Boot were recreated.
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Hi! I believe the error code means that setup is failing while preparing the SafeOS phase, which very could point to disk-layout issues aften been through multiple migrations (MBR>GPT, rebuilt EFI/BCD, etc.).
Please confirm the disk is GPT, that only one EFI partition exists on Disk 0, and right-size partitions per Microsoft’s guidance (EFI ≥200 MB FAT32; WinRE ≥300 MB with free space).
While retrying, leave only the system drive, keyboard, mouse, and display connected (detach other disks/USB devices) to eliminate peripheral conflicts.
Hi, thanks for the reply.
I can confirm the disk is GPT with a size of 428 MB format is FAT 32 and a recovery size of 293 GB.
Description: Windows Boot Manager
GPT partition GUID: {428FBF40-7091-4FC1-B5CE-A6C77693A0FA}
Partition number: 2
Partition starting sector: 1799563264
Partition ending sector: 1800439807
File path: \EFI\MICROSOFT\BOOT\BOOTMGFW.EFI
Where I can do it, I always put programs on another drive and leave the windows drive free of as many programs as I can.
Further to this I note there is a second entry:
Description: Windows Boot Manager
GPT partition GUID: {B4D0EE0E-75AD-11EC-A209-EB5D5E77596B}
Partition number: 1
Partition starting sector: 2048
Partition ending sector: 1799561682
File path: \EFI\Microsoft\Boot\bootmgfw.efi
Is this normal or does this just show a problem
Please confirm UEFI & secure boot: Press Win+R > msinfo32 > check BIOS Mode = UEFI and Secure Boot State = On.
Then open Command Prompt (Admin) and run: bcdedit /enum firmware
Share a screenshot of the results.
The boot configuration data store could not be opened.
The requested system device cannot be found.
I noticed 2 things after checking another computer.
First was that msconfig, boot tab, shows no bootloader.
Second is that disk manager describes the efi partition as, Healthy (system) Basic data partition, whereas the other fully working computer states Healthy efi partition.
Should I assume that the EFI partion is not correct? or is it just a descriptor.
Have you tried to perform a clean installation?
OK I managed to sort this out.
Multiple problems, so here goes.
After I noticed that the efi sector was formatted fat32 as a data partition, I decided to delete that partition and recreate it.
The second whammy is I used easyuefi and saw that for some reason the winboot had been placed on another drive. No idea when or how this happened, but after I did the rebuild, the error went away.
I tried to install Win 11 yet again, this time however it stopped at the restart and hung.
I then checked and saw that in the UEFI what looked like yet another drive still connected, but given I had physically unplugged all drives, I knew this could not be the case.
Next, I decided to think about unplugging all pcie cards, at which point I remembered I had put a SATA extender card in. This was because putting an NVME drive in, the board disabled 2 of the SATA slots.
It was this PCIE card that Windows 11 upgrade saw as a drive when it came to restart, and of course hung there.
Removing the PCIE card did the trick and Windows 11 installed.
Thanks for the help, which lead me to check everything all over again and helped in solving the issue.
Was a pleasure, glad to hear this helped you somehow, have a great day!
