I am running Windows XP SP3.
The first thing I noticed was a prompt that Windows Firewall had been disabled.
Secondly, Lavasoft Ad-Aware said that it had identified a process associated with a trojan (I didn't catch the name), and was blocking it.
Lavasoft Ad-Aware crashed shortly afterword.
A rogue antivirus program popped up a short minute later, but this was easily disabled, and has caused no further problems.
All I had to do to fix that was delete a.exe and msa.exe from a certain system folder.
It doesn't end there.
Systematically, as I tried to use all my other usual security programs, including Spybot, AVG, Windows Defender, SDFix, HJT, and Combofix, they would all run once, and then crash mid-scan, and cease working completely. Windows Defender gave an error regarding the service for it being stopped, and I am unable to manually restart the service via control panel. The other programs give errors with the common theme of "access denied".
Whatever this thing is, it has completely nuked the executables for the above mentioned antivirus programs.
I don't know how, but the access privileges have been changed in such a way so that I can't even delete these files, or overwrite them in a reinstall.
This is the first time I have been completely unable to open ANY of my usual antiviral programs.
I wish I had more information to give, but I don't. Whatever this is, it's extremely illusive.
I do not know where I contracted this, or even how to identify it, but am very worried by how it managed to fly by every single security measure I have installed.
Any help as to where I should start will be greatly appreciated.
Edited by garriottfan, 08 August 2009 - 01:11 PM.