Here is the link to my post yesterday which is more or less the same info here:
I am having a problem with a Windows XP Home computer. It was infected with malware and Trojans. I believe I got the infection cleaned up, but maybe not. Now the computer will access the Internet, via Mozilla Firefox and IE7, it will do Windows Updates, and it will update Microsoft Security Essentials, Super Anti-spyware, and SpyBot. It will not update MalwareBytes, Adaware, and it will not map drives. I get these errors:
Update failed. Make sure you are connected to the Internet and your firewall is set to allow Malwarebytesí Anti-Malware to access the internet.
Adaware (I just tried this out of curiosity when Malwarebytes didnít update)
No connection to download Server. Check Internet Connection
The drive could not be mapped because no network was found.
The malware infection was pretty severe. Icons were hidden, Programs were missing from All Programs. Task manager was hidden, etc, but after several scans with multiple anti-malware programs and Forefront and Microsoft Security Essentials, I finally got the hard drive to come up clean on the scans. I had removed the hard drive and connected it to a clean PC with an adapter. The Desktop icons and programs were still missing, so I started Googling. I ran Unhide, and ComboFix, ignoring the warnings not to use it unsupervised (bad idea). Unhide brought back the icons. I ran combofix, thinking that the infection was still infected.
The computer seemed fine after that, until I tried to update MalwareBytes. I had installed Microsoft Security Essentials, to replace McAfee. That was updating fine. I donít know if the network connection problem with the other programs means that the computer is still infected, or if maybe there is a simple solution. I did also try turning off the firewall, but that didnít make a difference. Rebuilding the computer is an option, but I figured since I have gotten this far, I should keep trying to fix the problem.
I hope someone can help, or if you think that rebuilding the computer is the way to go, thatís not a problem. I have experience rebuilding PCs, and I have the CDís.