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Q: Can't delete registry key "Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Microsoft Antimalware Setup" to reinstall Microsoft Security Essentials. This thread is locked from future replies

I am running Windows 7. I uninstalled MSE to reinstall it. I found a registry key "Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Microsoft Antimalware Setup" that's preventing the reinstallation. I can't delete it because the "OWNER/CREATOR" has set "Special permissions" on the sub keys that supersede the Administrator's rights. Does anyone know how to delete these keys and reinstall MSE?

Windows 7 Home Premium sp1
Manufacturer: Computer Express
Processor: Intel(R) Core(TM)2 DuoCPU
                T8300 @ 2.4GHz 2.40 GHz
Memory:   2.00GB
Type:        64-bit Operating System

Let me add that about every five web maneuvers, I get a popup directed to

I think these guys may have something to do with my problem.

As you can see, CREATOR-OWNER has "Special" permissions.


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At this point, I have NO version of MSE installed. It was removed by the FIXIT utility, which left the registry keys I can't seem to get rid of.
A. J.

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That was my original assumption.
A. J.

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I tried this too. It didn't work.

A. J.

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Have you tried deleting that key in safe mode? If not, please try it first. If it didn't work then go with this advanced and risky method:

Warning: This method involves editing registry which is a very sensitive thing. Incorrect editing of registry can lead to many many bad things including complete operating system crash. In addition to this risk there is also some far more risky thing involved. So please proceed with very precaution and follow the steps word to word. If you didn't understand anything then stop and ask.

Step 1: Download PsTools
Download SysInternals PsTools from here:
http://download.sysinternals.com/files/PSTools.zip

Step 2: Get PsExec.exe
Open PsTools and copy PsExec to C: drive.


Step 3: Start Command Prompt
Go to Start --> Type "cmd" in search box --> Right click on 'cmd.exe' and click on 'Run as Administrator'. This will open Command Prompt as Administrator.

Step 4: Run Registry Editor
Type this code and hit enter:
C:\psexec.exe -i -s regedit.exe


Step 5: Delete that key
Navigate to that conflicting key and delete it.

Note: You are making modifications with very superior rights so you must edit registry very carefully. With these superior rights you can edit system's critical keys also which normal run of regedit.exe will not. Please be very careful.
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That was my original assumption.


I removed the link from your original post.

It pointed to the adware described in this removal guide:

http://malwaretips.com/blogs/bettersurf-virus-removal/

^_^
Windows Insider MVP (Security), Moderator Microsoft Community

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At this point, I have NO version of MSE installed...       

Yes, I understand. I wasn't replying to your post.
--
~Robear Dyer (PA Bear)
Microsoft MVP (Windows Client) since October 2002

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Thank you PrashantKumar96! With your assistance, I have successfully deleted the persistent keys. HOWEVER, I embarrassed to report that I have encountered the same error when I tried to re-install MSE again. 
I will review the MSE installation checklist and try again. It would be nice if someone could give me an application or procedure that "steps through" each command of the installation process (like VB) so that I can see what step is encountering the internal error. 

Does anyone know an application or code I could use diagnose my MSE installation problem?
A. J.

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Folder 'C:\ProgramData\Microsoft\Microsoft Antimalware\Support' contains installation logs of MSE. You can use them to troubleshoot the problem.

BTW, what error you are getting? You always mentioned problem with deleting that registry key but didn't mention about any other error.
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I have encountered the same error when I tried to [install] MSE again.

And the complete (verbatim) error would be...?
--
~Robear Dyer (PA Bear)
Microsoft MVP (Windows Client) since October 2002

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I just had an issue with my Win 7 Microsoft Security Essentials. Windows update
would download the upgrade, but the upgrade could not install. After many
hours of searching help sites and web search engines, I finally found out
what the problem was. Somehow, Windows lost the install information
file. And without those files.......<br>
Go to

'''''[http://support.microsoft.com/mats/Program_Install_and_Uninstall Fix problems that programs cannot be installed or uninstalled]'''''

and check it out. I ended up using the Fix-It program to manually remove

two programs called Microsoft Security Client. Don't forget to first download

the current Microsoft Security Essentials first. 

 

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Question Info

Views: 4,010 Last updated: April 9, 2018 Applies to: