I can't install antivirus software, because Windows XP reports that additional protector is installed, despite having removed the malware.

I followed the instructions on bleepingcomputer.com as suggested and am trying to run a clean boot using msconfig to disable all startup programs and the non-microsoft services. reports of msconfig access denied error when you try to change a service.

Suite McAfee was previously installed on this system, but is more work after that "Additional Guard" has appeared and has been uninstalled due to the failure of an attempt to reinstall. The McAfee software will not be installed successfully. AVG Free edition does not install because it indicates that the additional guard already is installled. I was able to run Malwarebytes Anti-malware to remove Additional Guard system and am unable to find any remaining files or registry keys. I scanned for rootkits, but was unable to find anything. What else could happen? More precisely:

(1) what is causing access denied error in msconfig (I get this despite running as administrator in normal mode and safe).

(2) If, if not in the registry, the false information on guard is running might be coming from?

Let alone msconfig for the moment. To ensure that all references to McAfee are removed, use the removal tool.

McAfee Removal Tool - http://service.mcafee.com/FAQDocument.aspx?id=TS100507
Reboot after running the tool.

If the malware is really out of the system, and you can't always install AVG after you run the McAfee removal tool, you can try to reset the Windows repository that keeps track of security programs you have installed.

Start > run > cmd [OK]
The command prompt opens. At the prompt, type:

net stop winmgmt [Enter]
[Answering the prompt Yes or no with 'Yes'. See the message on the stopping services].
CD C:\Windows\System32\wbem [Enter]
repository.old repository ren [Enter]

Exit command prompt and restart the system. Try to install AVG again. If it fails, you will have to enter back to BleepingComputer to ensure that your malware has been removed really. MS - MVP - Elephant Boy computers - don't panic!

Tags: Windows

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