Fedora hangs driving me nuts, in Windows it works without problems!

[Gordon Messmer]

Google results for "xorg hangs Sandybridge i915" turn up a whole lot of 
results (sadly).  Among the first page results is one report that a bad 
BIOS was responsible for the problem.  Have you updated yours?

Has this system ever run a Linux distribution that didn't hang/crash?

It may be useful to configure kdump on your system to see if that can 
capture the cause of the crash.