Windows7 intermittent lockup. Suspect malware.

This one is kicking my butt so far. It has indications of malware, but I'm not having much luck tracking this down. The primary symptom is that the PC will hang or pause for several minutes, then continue (unless I get impatient and cycle power). I've run through the "Run and Read Me First" guide. Logs are attached.

 

Upon further investigation, it appears that the slowdown (hang) situation coincided with logged errors regarding the nvidia controller issuing a reset to the hard drive. I tried using PING to image the drive and ended up with a 1TB brick. We can close this thread as that computer and that situation is no longer viable. Thanks though!