Windows 7 Forums
Welcome to Windows 7 Forums. Our forum is dedicated to helping you find support and solutions for any problems regarding your Windows 7 PC be it Dell, HP, Acer, Asus or a custom build. We also provide an extensive Windows 7 tutorial section that covers a wide range of tips and tricks.

Windows 7: Dual-Boot System upgraded to Win10, now Win7 gives LogonUI.exe error

25 Nov 2015   #1

Windows 7 Professional 64 bit
Dual-Boot System upgraded to Win10, now Win7 gives LogonUI.exe 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 Tenforums, too, since it appears to be related to that "Get Windows 10 Upgrade.


My System SpecsSystem Spec
25 Nov 2015   #2

Win-7-Pro64bit 7-H-Prem-64bit

If it's a clone of the original install then you already upgraded the 7 install and 10/ M$ knows it.

The free upgrade is about eating/ removing win-7 and other qualifying licenses not keeping both at the same time,

There was a fishing story that M$ didn't care but the clone would have to be disconnected and never connected with the 10 install
But I wouldn't give that fishing story much credit = you upgrade and that is that.

The only way back is 10's system restore.
And probably a clean install of the qualifying os.
My System SpecsSystem Spec
26 Nov 2015   #3

Windows 7 Professional 64 bit

Hi - Thanks for the reply. But, the clone was taken before the other copy was upgraded.

And, I can boot, sort of, into that Win7 on HDD-1, the Starting Windows 7 screen opens, then the LogonUI error. Clicking past that, I can Crtl+Alt+Del and open the screen with the switch users, change password, run Task Manager. And, if I run Task Manager, I can actually run all my old Windows 7 programs.

All that tells me that copy of Windows 7 is still there and running ( I even get the correct Shutting Down screen for Windows 7). Its just that I can't get pasted the LogonUI.exe error. I did fix the "not genuine" issue buy running from Cmd the slmgr -rearm. So now after I get past the LogonUI error, I just get a black screen, no real desktop.
My System SpecsSystem Spec

26 Nov 2015   #4

Windows 7 Professional 64 bit

See this thread on the Tenforums ------ solved by loaded an image (out of date) but booted just fine. I still don't think the Windows 10 upgrade on HDD0 should have affected the Windows 7 on HDD1 since it was not being upgraded, but sfc /scannow found damaged files and could not repair them. Also, this partition ran just fine prior to the upgrade of the "other" Windows 7 partition.


Solved Dual-Boot System upgraded to Windows 10, now Win7 gives LogON error - Page 2 - Windows 10 Forums
My System SpecsSystem Spec

 Dual-Boot System upgraded to Win10, now Win7 gives LogonUI.exe error

Thread Tools

Similar help and support threads
Thread Forum
Win7 to win10 upgrade error.
Hallo all. I have some problem with updating Windows7 Home Premium 64bit OEM to Win10. The problem: I Tray to upgrade and got some error code: C0000022, windows restarting in 88% and nothing. Then i tray to fix the problem with MicrosoftFixit50123. Restart pc and tray again and got the...
Windows Updates & Activation
Why WU Reserved Win10 in a Win8.1 System Using a Win7 KB Update??
I've got a question for the Pro's :geek: ... This is regarding my ASUS Tablet with Windows 8.1 Professional x86 installed (Windows is activated of course). The Tablet currently has Windows 10 reserved and after looking at this post, i took a curious look at the KB used to reserve it and...
Windows Updates & Activation
Need help creating a Win7 and XP dual boot system
Hi to all, I'm new to this forum, the reason I'm here is that I (apparently like a whole lot of others) am finding it impossible to create a working dual boot system. For those who wonder why I need a dual boot system, long story short, I have a number of programs and related hardware that won't...
Installation & Setup
Logonui.exe system error shell32.dll mising HELP!
I downloaded a icon pack installer yesterday and it told me that i needed a restart for the results to take place... when i restarted my computer it came to the log on screen where i would usually enter my password but the screen was black all that was visible was the cusor, a turn off button at...
BSOD Help and Support
A fresh win7 install over a win7/vista dual boot system ?
Hello all, I have a vaio laptop with a dual boot win7/vista setup. I simply want to format the whole drive back to one large c:\drive, then reinstall windows 7. I have heard horror stories of people saying their boot manager becomes corrupted. or goes missing. I enclose a snapshot of my hard...
Installation & Setup
Backing up dual boot Win7 / XP Pro SP3 System
Hi, Don't ya just love people who only join when they have trouble and lurk the rest of the time? <Like Me> I've been reading a bunch of posts and I think I've got a few ideas on how to go about this, but I haven't found a post that is exactly the same problem. I just found out that my old...
Performance & Maintenance

Our Sites

Site Links

About Us

Find Us

Windows 7 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 7" and related materials are trademarks of Microsoft Corp.

Designer Media Ltd

All times are GMT -5. The time now is 10:33.
Twitter Facebook Google+ Seven Forums iOS App Seven Forums Android App