Windows 11, version 25H2 CHostIsUEFICompliantChecker failed

Ron J. Buitenhuis 0 Reputatiepunten
2026-08-07T07:55:36.9766667+00:00

Just to be a good citizen, I leave my SetupDiag output, maybe another Insider has gained insight to recover from this situation?

WSUS issue : Windows update advise for enlarging EUFI disk boot partition to 500Mb caused my perfectly working system to go in limpmode!!! I have tried every suggestion in the "book", but I cannot get my system revived back into a good working insiderbuild... When enlarging the EUFI bootpartition you also loose bitlocker functionality (Which is explainable, but very troublesome when not being able to correct the issue!)

So my humble question is, before I have to decide and fully rebuild my machine (doable but cumbersome)
Why can you not correctly recover from a misaligned UEFI/BCD/Recovery-configuration, bcdedit /enum firmware will not find the systemdevice and therefore cripples your Windows 11 build (Insider or not)

The output is explainable because CHostIsUEFICompliantChecker failed, but howto reconfigure a correct working eufi boot partition : bcdboot C:\Windows /s S: /f UEFI does not do the trick!

Matching Profile found: FindAbruptDownlevelFailure - 55882B1A-DA3E-408A-9076-23B22A0472BD

SetupDiag version: 1.7.0.0

System Information:

Machine Name = HP-ZBOOK-RJ

Manufacturer = HP

Model = HP ZBook 15 G6

HostOSArchitecture = x64

FirmwareType = UEFI

BiosReleaseDate = 20260505000000.000000+000

BiosVendor = R92 Ver. 01.35.02

BiosVersion = R92 Ver. 01.35.02

HostOSVersion = 10.0.26220

HostOSBuildString = 26100.2.amd64fre.ge_release_flt.250909-1321

TargetOSBuildString = 10.0.26100.8875 (ge_release_svc_prod1.260710-1804)

HostOSLanguageId = 1043

HostOSEdition = Professional

RegisteredAV = Windows Defender

FilterDrivers = 

UpgradeStartTime = 7-8-2026 09:21:31

UpgradeEndTime = 7-8-2026 09:21:58

UpgradeElapsedTime = 00:00:27

CV = Id2NPU+Wh0OhAXss

ReportId = 84F92676-C50F-47BA-8877-9CB3ADED078F

Error: SetupDiag reports abrupt down-level failure.

Last Operation:

Error: 0x80070003 - 0x20008

LogEntry: 2026-08-07 09:21:35, Error CHostIsUEFICompliantChecker failed. [Failed to check whether host has UEFI disk layout.] HRESULT = 0x80070003[gle=0x00000001]

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