Q1: How to solve this CRYPT_E_NOT_FOUND issue for unofficial 27XXX.1000 Prerelease reconstruction, e.g. EnterpriseG ? Code: 2025-07-14 23:51:27, Error CBS Failed to verify if mum file \\?\K:\Windows\CbsTemp\4696_594000\Microsoft-Windows-EnterpriseGEdition~31bf3856ad364e35~amd64~~10.0.27898.1000.mum is vouched for by catalog \\?\K:\Windows\CbsTemp\4696_594000\Microsoft-Windows-EnterpriseGEdition~31bf3856ad364e35~amd64~~10.0.27898.1000.cat. [HRESULT = 0x80092004 - CRYPT_E_NOT_FOUND] . The Edition cat and mum is modified from 27898.1000 Professional. It is OK as of 26100.1. And it's OK to convert from official Pro to official Core. Code: C:\windows\system32>dism /english /logpath:z:\1.log /image:K: /apply-unattend:Z:\WinSxS\1.xml Deployment Image Servicing and Management tool Version: 10.0.19041.844 Image Version: 10.0.27898.1000 Removing package Microsoft-Windows-ProfessionalEdition~31bf3856ad364e35~amd64~~10.0.27898.1000 [==========================100.0%==========================] The operation completed successfully. C:\windows\system32> Unfortunately, it got stuck at "OOBE loop".