Come on Microsoft admit it the Windows 8.1 (6.3.9600 Build 9600) update KB2919335 has problems. I have an HPZ820 computer with a dual boot, to Windows 7 from a second drive and have tried everything to install this update.
I have installed the update with no problems on two low end PC’s with an EFI partion (see end of message).
The following are some of the things I have tried.
- Updated the bios
- Did a refresh of Windows 8.1 keeping my programs
- Tried different boot options
2 Boot Logging
8 Early Malware logging
1 Enable debugging
4 Enable safe mode
The computer rebooted each time to the UEFI Boot options screen and seemed to ignore the mode selected.
- I ran the repair mode where you enter your password the computer rebooted back into the old 8.1
I think the problem lies in the initial boot process. There has to be a bug there, because I never get to the dual boot screen asking which version of Windows I want to run. It means there is nothing wrong with the Windows
files because it is not running an operating system as it never gets to that point.
All the solutions are irrelevant because Windows does not even get a chance to start. My Windows 8.1 runs fine, so the update is messing up the boot file stopping a boot.
My computer has a UEFI bios but on checking Windows System Information “Bios Mode” it is using the legacy bios. There is no EFI partition on my HD. Is this the problem that the new update requires an EFI partion on the HD.
The Boot Option screen is part of UEFI, because I am running a legacy bios are the options mostly irrelevant.