I would run the appropriate diagnostic
on the hard drive.
If you do a Google search...you will see that there are many reasons that a system freezes.
Both tasks involve various common elements...the hard drive is just a logical candidate (because that's where the files are), IMO.
Free Hard Drive Testing Tools - Hard Drive Diagnostics - http://pcsupport.about.com/od/toolsofthetrade/tp/tophddiag.htm
Please download MiniToolBox
, save it to your desktop and run it.
Checkmark the following checkboxes:
List last 10 Event Viewer log
List Installed Programs
List Users, Partitions and Memory size.
Click Go and paste the content into your next post.
Also...please Publish a Snapshot using Speccy - http://www.bleepingcomputer.com/forums/topic323892.html/page__p__1797792#entry1797792
Edited by hamluis, 16 July 2012 - 01:36 PM.