hi saltnpepper,
As of right now, avast! is protecting your system by blocking and quarantining the virii files to chest.
Suggest access to a clean system and posting all requested logs for malware analysis by a malware removal expert. Based on what these logs contain, a fix will be proposed, and you will run the fix and report back.
Using a clean system instead of your infected one will prevent deeper and further infection; you will transfer needed programs, files, and logs back and forth as needed. You can begin by attaching the required logs using the clean system in the beginning.
AdwCleaner, Malwarebytes, OTL, and aswMBR.exe are the ones to start with.
http://forum.avast.com/index.php?topic=53253.0Once the required logs are attached (not pasted) a malware expert will be notified.