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Dual-Boot System upgraded to Windows 10, now Win7 gives LogON error
I have a dual boot system in the following configuration:
HDD-0 = Win7 OS, HDD-1 = Win7 OS, WinXP OS. I have successfully booted into each of these operating systems - and the Win7 OS on HDD-1 is an exact clone of the primary OS on HDD-0.
I just upgraded the Win7 OS on HDD-0 to Windows 10 using the "Get Windows 10" process. I now get the new blue Boot Manger screen with all three OS's listed and I can successfully boot into Windows 10 and Windows XP. But I cannot boot into the Win7 OS on HDD-1 (which I could before the Windows 10 upgrade). How the upgrade even knew about the other copy of Windows 7, since it was not active and lives on another HDD is beyond me.
One strange thing - if I do a cold startup (power on) I get the new Boot Manger screen. But if I do a Restart from Windows 10, I get the old, black & white boot manger screen - and it does list all three OS's correctly, too.
The error message I get when trying to open (boot) the Windows 7 OS is: "LogonUI.exc - Entry point not found. RtlReleasePath could not be located in the ntdll.dll" And, like others, I now get the black screen with "Windows 7, Build 7601 This copy of Windows is not genuine (but it was yesterday before the Windows 10 upgrade on the other HDD).
And like others, I can start the Crtl+Alt+Del to get the screen with users, Task Manger, etc. And, I can run all my applications by manually starting them in a New Task and browsing to the exe file - like Firefox.exe or Word.exe So, it looks like Windows 7 started and may be running. I just can't get into it.
I understand this may have something to do with the faster boot that was introduced in Windows 8 since the problem started around then.
I think both issues, the LogOn and the "Not Genuine" are both related to the Entry Point no located in the ntdll.dll.
At this point I really don't want to reload Windows 7 since it appears to be running and all the apps can be run manually.
All this happened after the upgrade of the other Win7 on HDD-0.
I'm going to post this in the Sevenforums, too, since it may be related to that OS as well.
Thanks