Hi everyone, my first time posting on BleepingComputer, maybe this will be my go-to troubleshooting site
Running Windows XP Pro, Service Pack 3
A while ago (a couple months) my computer apparently came down with a virus (or several) which were detected by avast! antivirus. After visiting some of my usual favorite, seemingly innocuous websites, I got several alerts from avast saying that it moved various infected files to the chest. A reboot and boot-time scan later, and many, many more files were quarantined. I went to the avast website, got some support, and according to the guy who helped me out, cleared out all the malware/viruses/whatever. Various scans supported this, so I'm reasonably satisfied that I'm currently infection-free.
However, several problems since that incident have persisted, which due to a lack of responses on the avast forums, I gave up trying to solve for a while.
Problem #1: When I start up the computer, everything proceeds normally until I get to the desktop, at which point the computer becomes partially unresponsive for a few minutes. I can't access the task manager, the task bar, or delve very deep into folders. After usually about 5 minutes or so, the Windows theme finally plays and the computer works normally.
Problem #2: The computer no longer seems to recognize USB flash drives. Other USB devices seem to work fine though (mouse, keyboard, printer, Wacom tablet).
Problem 1 is just inconvenient, but I'm very concerned about Problem 2, as my biggest fear is having to wipe my hard drive (which happens surprisingly often to me). I have a large external USB HD that I use to back up all my personal files, but since this incident, I have been unable to use it. If my computer fails now, I'll lose the last few months' worth of files. A recent BSOD event scared me into getting back onto figuring this out.
One final note: avast moved over 40 files into the virus chest during this virus incident, many of which were .sys files (list included at the end of the post) from C:\Windows\system32\drivers. They were labeled as being infected by Win32:Bubnix-J[Rtk]. Also of note, when I insert a flash drive, the USB Mass Storage Device listing under the Universal Serial Bus Controllers list has an exclamation mark next to it. It says under Properties that "Windows cannot start this hardware device because its configuration information (in the registry) is incomplete or damaged". The same message and exclamation marks appear next to Microsoft Kernel Acoustic Echo Canceller, Microsoft Kernel Audio Splitter, Microsoft Kernel DRM Audio Descrambler, and Microsoft Kernel GS Wavetable Synthesizer under Sound, video and game controllers. My theory is that avast moved several infected files necessary for these now-bugged functions into quarantine and is keeping them from running.
Whatever the problem is, I could use some advice on how to proceed. Also, here's a link to my post on avast's support forum, which explains everything more in-depth, if necessary.