Strange Behavior

[dcloud]

I found out this morning that my website had been compromised and was infected with a couple viruses. My hosting company informed me that this could have occurred because my computer was infected. avast had shown me nothing to warn me of any viruses and when I opened the program to scan my computer the scan area was blank. There was nothing to click, no scan button and all the options were blank. I have attached a screenshot to show you what I mean.

If someone could explain to me what has caused this I would appreciate it. Perhaps avast has been compromised by something that's already infecting my computer. I tried using a couple online virus scans (McAfee, BitDefender, HouseCall), but they said my PC was clean, so I don't know.

[Pondus]

have you tried avast repair and reboot ?

For a repair of avast. Windows, Add Remove programs, select 'avast! Anti-Virus,' click the Change/Remove button from the pop-up window, scroll down to Repair, click next and follow.

[dcloud]

Didn't change anything. It's still all blank.

[Pondus]

did you just install avast?

what AV did you use before avast?
did you uninstall it before installing avast?
did you run a removal tool to clear any leftover files that may conflict?

[dcloud]

did you just install avast?  -- No, I've had it a while.

what AV did you use before avast?  -- AVG

did you uninstall it before installing avast?  --Yes

did you run a removal tool to clear any leftover files that may conflict?  -- If you mean AVG, yes.

[Pondus]

follow the guide here and attach the OTL log
http://forum.avast.com/index.php?topic=53253.0

then maybe Essexboy can spot something strange inside

[dcloud]

Thanks, I'll go do that. Should I post the logs here in this thread?

[Pondus]

yes...i have notified Essexboy so he will look here when he arrive
he probably wont be here before tomorrow

[dcloud]

I ran all the programs and saved each log file as instructed. I have attached them to this post. Thank you for all your help. Let me know what you find.

[essexboy]

First we need to remove McAfee 

Uninstall McAfee via programmes and features
Then run this McAfee uninstall tool  http://download.mcafee.com/products/licensed/cust_support_patches/MCPR.exe

Finally conduct an Avast repair as previous

Did that fix it ?

[dcloud]

I uninstalled McAfee and ran the removal tool, then I did the avast repair, but the scan screen is still blank.

[essexboy]

I think a full uninstal then reinstall is probably required here

I can see no apparent malware

[dcloud]

Ok, thanks for the help. I'll do that then report back.

[dcloud]

My thanks to Pondus and essexboy. I appreciate you guys taking the time to help me. I have uninstalled avast using the utility and reinstalled the program. The scan screen now shows all the options. Just out of curiosity, would you have any idea why the scan screen was blank? My hosting service had to clean out my server of a couple nasty viruses and they thought it could have come from my PC. I scanned it with all the utilities you mentioned and no malware or viruses were found. Just seems odd.

Thanks again

[essexboy]

My belief is that you were not infected but that McAfee was stopping Avast from displaying properly, or it was just a glitch within Avast.  I could not say for sure which