Problem with my Toshiba Qosmio X505-Q887

Hi guys,
I’ve been having this problem with my Laptop (Toshiba Qosmio X505-Q887) and I need your help. I don’t know what the cause is but, my computer is freezing like crazy. I cannot figure out why. It seems to happen at random times and it doesn’t seem to matter what I am doing at the time. It seems totally random to me. Sometimes it happens within a few minutes of starting up the computer, or 30 minutes,an hour or more into using it. Other times I can use it for all day/night with no problems. I can be playing games, watching a movie, surfing the web, typing in a forum, watching YouTube, downloading data or even just while idle.
It doesn’t restart it just locks up, the screen freezes, the sound stops, and the mouse stops moving. The keyboard will still light up when a key is pressed but the “Caps Lock” and Num Lock” toggle lights go off and are non responsive. I’m forced to hard reboot, and sometimes before BIOS it says no OS found, I’m not sure if that’s because of the same problem or the result of the hard reboot. Other times it freezes while Windows is starting up. Once it happens it repeats it’s self a few times and either remains stable or keeps happening until I give up and come back later.

At first I thought it might be a heat issue as a desktop replacement “gaming” laptop it does heat up pretty good under load, sometimes though it’s not hot at all when it freezes. Just in case though I cleaned out the vent on the back and made sure there was no dust or anything blocking it and elevated it by about an inch off the desk for airflow. It still happened so I thought it might be a virus, I use Avast and ran a scan and a startup scan didn’t help. I tried using the computer while the AC power cable it not connected and just running on the battery, still froze. I tried taking the battery our and just running off the power cable, still froze. I tried using Windows Startup Repair, it did its thing for a while then it came on and said it would not repair the problem. Below are the details Starup Repair gave me. Sorry for the long post and thanks for the help! If there is any other info that I left out that might be pertinent ask and I’ll do my best to answer.

Windows Startup Repair

Problem Event Name: StartupRepairOffline
Problem Signature 01: 6.1.7600.16385
Problem Signature 02: 6.1.7600.16385
Problem Signature 03: unknown
Problem Signature 04: 266
Problem Signature 05: AutoFailover
Problem Signature 06: 1
Problem Signature 07: NoRootCause
OS Version: 6.1.7600.2.0.0256.1
Locale ID: 1033

System Specs
Intel Core i7 740QM / 1.73 GHz
4GB DDR3 1066MHz memory
NVIDIA® GeForce® GTS 360M (2298MB total: 1GB GDDR5 discrete memory + up to 1274MB shared memory w/NVIDIA® TurboCache™ technology)
500GB HDD (7200rpm)
Blu-ray Disc™ ROM and DVD SuperMulti drive with Labelflash®
Microsoft Windows 7 Home Premium 64-bit Edition
AC Adapter 180W (19V x 9.5A) Auto-sensing,100-240V AC Adapter
Battery High Capacity Li-Ion (87Wh, 12-cell)