Windows 7: Freezing/Locking up periodically

My computer is now 5 days old.
I installed a retail version of Windows 7 Home Premium 32bit.

Everything keeps freezing at random intervals. It happens very randomly, both while playing games and while writing this message the first time in firefox (crashed while writing a crashreport, how ironic). 30-60 minutes apart.

Specs is as follows:

Intel Core i7 2600 3.40 Ghz (4 Cores - 8 Threads)
Arctic Cooling Freezer 13
P8H67-M EVO B3 Sandy Bridge
Kingston DDR3 - 1333 Mhz - 8 GB (2 x 4 GB) Value
Sapphire Radeon HD 5850 1 GB TOXIC (OC)
OCZ Vertex 3 Series 60GB SSD
Antec Three Hundred Midi Tower
Corsair 750 Watt



I tried what I could think of. Ran CCleaner, Put all the fans to max, tried different settings in the bios menu (Normal, Performance, Power Saving).

Here is the health and dump reports.
https://***************/files/282445761/Reports.zip

Hope you can help me to find out what is going on. If you cant, I have to return the whole thing to the dealer and purchase another one

*Just did some tests for temperature with RealTemp. Even at 100% CPU load the temp. is not even getting close to hot. So its obviously not a heating problem.
*When the freeze happens, everything just stops. Sometimes I can still move the mouse, sometimes I can't. Ctrl+alt+del doesn't do anything, I can't alt+tab or anything at all. 1 time i received a BSOD, the other times I just hard reset after a couple secs. with nothing happening.