Windows 11 installation assistant unsupported CPU

Question

I have a Dell Precision 5520 with i7-7820HQ.

The PC Health Check app says its supported and I also checked the minimum requirements page which says that this processor is supported.

When I open the installation assistant, the first screen says that my hardware checks out and I am able to install Windows 11.

The setup downloads and verifies the download files for windows 11. After that it begins the installation process.

After the install completes, there is a screen which checks if the PC is compatible again and I get an error here saying that my processor is unsupported. After that the whole install fails and all changes are reverted.

I tried a couple of times and get the same error. Is there a fix for this ?

Answer 1

Came across this thread on Reddit: https://www.reddit.com/r/Dell/comments/q2a0bc/windows_11_on_precision_5520/

Either Dell needs to update drivers to pass the check or Microsoft needs to fix something.

I went through with the registry update to upgrade to Windows 11.

Answer 2

Please post results for:

a) setupdiag
https://learn.microsoft.com/en-us/windows/deployment/upgrade/setupdiag

b) V2 log collector:

https://www.windowsq.com/t/bsod-posting-instructions.17/
https://www.windowsq.com/resources/v2-log-collector.8/
https://www.tenforums.com/bsod-crashes-debugging/2198-bsod-posting-instructions.html

c) additional files may be collected for troubleshooting pending the above the above results
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Answer 3

If you get This PC meets Windows 11 requirements with PC Health Check app, then you can try manual upgrade:

https://www.kapilarya.com/how-to-upgrade-windows-10-to-windows-11-using-iso-file

Hope this helps!

Note: Included link in this reply refers to blog post by a trusted Microsoft MVP.

Answer 4

@Kapil Arya I wanted to avoid the ISO method and go with the installation assistant. The ISO method is if I cant get this to work or if Microsoft does not push the update to my device.

@Docs I'll capture those logs and post later today.

Answer 5

Here are the log files from setupDiag.exe

Matching Profile found: FindAbruptDownlevelFailure - 55882B1A-DA3E-408A-9076-23B22A0472BD
SetupDiag version: 1.6.2107.27002
System Information:
Machine Name = ADRIANSRIG
Manufacturer = Dell Inc.
Model = Precision 5520
HostOSArchitecture = 1033
FirmwareType = UEFI
BiosReleaseDate = 20211012000000.000000+000
BiosVendor = 1.25.0
BiosVersion = 1.25.0
HostOSVersion =
HostOSBuildString = 19041.1.amd64fre.vb_release.191206-1406
TargetOSBuildString = 10.0.22000.194 (co_release_svc_prod1.210911-1543)
HostOSLanguageId =
HostOSEdition = Professional
RegisteredAV = Windows Defender
FilterDrivers =
UpgradeStartTime = 1/1/0001 12:00:00 AM
UpgradeEndTime = 11/19/2021 9:53:00 PM
UpgradeElapsedTime = 00:00:00
CV = kUAsCZpac0qvQknL
ReportId = a441eb63-6143-4e32-b8d3-14b946ecc421

Error: SetupDiag reports abrupt down-level failure.
Last Operation: Finalize
Error: 0xC1900201 - 0x40008
LogEntry: 2021-11-19 21:52:51, Error MOUPG CDlpActionCompat::ExecuteSysReqScan(809): Result = 0xC1900201

Refer to "https://learn.microsoft.com/en-us/windows/desktop/Debug/system-error-codes" for error information.