[BUG] - Add reg delete "HKCU\SOFTWARE\Sysinternals\Process Explorer" /v "OneInstance" /f > nul 2>&1

[NukeDev]

Description

After a while i decided to rollback to the default Task Manager, using the "Uninstall Process Explorer.cmd" .

Then, when i start the old Task Manager i receive this error.

I've tried to delete the reg key: "Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\taskmgr.exe", restarted the PC.

Then when i try to open Task Manager, it's start and close immediatly.

These are the logs of event viewer:

Faulting application name: taskmgr.exe, version: 10.0.22621.3085, time stamp: 0xf6325816

Faulting module name: taskmgr.exe, version: 10.0.22621.3085, time stamp: 0xf6325816

Exception code: 0xc0000005

Fault offset: 0x0000000000015b6b

Faulting process ID: 0x0x1860

Faulting application start time: 0x0x1DA6CC0EC0EC9A5

Faulting application path: C:\Windows\system32\taskmgr.exe

Faulting module path: C:\Windows\system32\taskmgr.exe

Report ID: 422c1d04-9b4b-435a-a8e3-121eed2b9110

Faulting package full name:

Faulting package-relative application ID:

Then i deleted the key "HKCU\SOFTWARE\Sysinternals\Process Explorer" /v "OneInstance" and task manager now works!

Steps to reproduce

As in the description

Expected behavior

As in the description

Actual behavior

As in the description

Atlas Edition

Atlas for Windows 11 23H2

Desktop information

not relevant

Additional content

No response

[duch11]

Same issue here. Except the fix mentioned here does not work in my case.

I DO GET a blue screen error as well, when I run the uninstall script..

I've narrowed it down to this line: sc start pcw > nul 2>&1

When I run it manually from cmd it crashes my whole machine. I could not find any logs for the blue screen of death.

Event Viewer from my side: (Exact same taskmgr.exe crash type and version)

Faulting application name: taskmgr.exe, version: 10.0.22621.3085, time stamp: 0xf6325816
Faulting module name: taskmgr.exe, version: 10.0.22621.3085, time stamp: 0xf6325816
Exception code: 0xc0000005
Fault offset: 0x0000000000015b6b
Faulting process id: 0x0x1310
Faulting application start time: 0x0x1DA6DB168A127CA
Faulting application path: C:\Windows\system32\taskmgr.exe
Faulting module path: C:\Windows\system32\taskmgr.exe
Report Id: 37b398d1-1673-4278-8e5b-1cabeacb0fd7
Faulting package full name: 
Faulting package-relative application ID: 

[NukeDev]

To solve, run step by step uninstall script and reboot. Next, remove "Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\taskmgr.exe" & "HKCU\SOFTWARE\Sysinternals\Process Explorer" /v "OneInstance" then reboot.

[duch11]

To solve, run step by step uninstall script and reboot. Next, remove "Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\taskmgr.exe" & "HKCU\SOFTWARE\Sysinternals\Process Explorer" /v "OneInstance" then reboot.

Thank you!

But I had an additional issue:

sc config pcw start=boot had not run successfully on my machine. And thus it still didn't work.

sc start pcw crashed my computer.. Probably due to BitDefender or some other reason..

I fixed it though and everything is back to normal 👍

Fix:

0. Delete the registry keys as @NukeDev explained in this issue
1. Start Command Prompt with Administrator Privileges
2. Run: sc config pcw start=boot
3. Reboot!

Problem was that the Uninstall script would blue screen my computer. So the sc config pcw start=boot had not gone into effect due to the crash..

Hope this helps some other poor soul out there <3

[Xyueta]

Should be resolved now.