confusing computer problems....

[AJ!]

Well i only got it from alienware a few months ago so i havnt been messing with anything inside it.

Operating System: Genuine Windows® XP Professional UK with SP2 - English
Chassis Upgrades: Alienware® AlienIce™ 3.0 Video Cooling + AlienFX™ System Lighting + Alienware® High-Performance Liquid Cooling
Power Supply: 700 Watt Alienware® Approved Multi-GPU Power Supply
Motherboard: Alienware® Approved NVIDIA nForce™ 4 SLI Motherboard
Processor: Intel® Core™ 2 Duo E6700 2.66GHz 4MB Cache 1066MHz FSB
Memory: 4GB DDR2 PC-6400 SDRAM at 800MHz - 4 x 1024MB
Video Card: Dual 512MB NVIDIA® GeForce™ 7950 GT - SLI Enabled
Physics Processing Unit : AGEIA PhysX™ Physics Processing Unit
Video Optimiser: AlienAdrenaline: Video Performance
System Drive: Single Drive Configuration - 250 GB Serial ATA 3Gb/s, 7,200 rpm with 8MB Cache
Optical Drive One: 18x Dual Layer DVD±R/W Drive
Sound Card: High-Definition 7.1 Performance Audio - Standard
Network Card: Integrated High Performance Intel Gigabit Ethernet Adapter (DSL-ready)
Floppy Drive: 1.44 MB Floppy Drive - Black
Speakers: Creative® 2.1 Inspire™ T3100 - UK Power Supply

Thats the exact information from a Email from them...
I dont know if any of that helps explain the problem though

Sometimes the computer will even reboot when im on the desktop doing something