I first noticed something was wrong when I fired up my PC yesterday and went to open Steam (which was working fine the night before) and got the error message "The item "Steam.exe" that this shortcut refers to has been changed or moved, so this shortcut will no longer work properly." Then Avast started popping alerts, saying that a Trojan was detected.
Steps taken so far...
I ran malwarebytes (free) first, got a few non-malware hits that I quarantined anyway.
Ran Avast, did a quick scan. It found around 150 infected files. (Identified as Win32:Kryptik-PFA [trj])
Went into safe mode.
Ran Rkill.exe, tdsskiller, roguekiller then Malwarebytes again.
Ran Avast again, this time did a full scan and found another 39 infected files.
That's where i'm at now. I'm not really sure how to proceed from here, so please help if you can spare some time. Thanks.
Edit: seeing a lot of reports that these are false positives caused by an update to Avast. https://forum.avast.com/index.php?topic=170709.0
Edited by Icarus1001, 06 May 2015 - 05:39 PM.