Ive tried 4 other sticks of ram, so i don't think its ram, power supply is big enough, no oc's, but windows seems to love to restart its self... i hate it, so I multiboot Debian with no issues but as for windows Im using an integrated sound chip (82801g) that's shipped with the "Realtek HD Audio Manager", dont know if that has any influence on kmixer.sys .... not really sure what info to add on this one cause im usually able to fix my problems, added some dumps too, thnks

PC wizard summary:
Mainboard : ECS 945P-A
Chipset : Intel i945P
Processor : Intel Pentium 4 550 @ 3400 MHz
Physical Memory : 2048 MB (2 x 1024 DDR2-SDRAM )
Video Card : NVIDIA GeForce 8500 GT
Video Card : NVIDIA GeForce 8500 GT
Hard Disk : Maxtor (80 GB)
Hard Disk : WDC (250 GB)
Hard Disk : WDC (80 GB)
CD-Rom Drive : OPTORITE CD-RW CW5205
DVD-Rom Drive : MagicISO Virtual DVD-ROM0000
DVD-Rom Drive : MagicISO Virtual DVD-ROM0001
DVD-Rom Drive : MagicISO Virtual DVD-ROM0002
DVD-Rom Drive : MagicISO Virtual DVD-ROM0003
Monitor Type : Dell Computer DELL P793 - 16 inches
Monitor Type : Dell Computer DELL E772p - 15 inches
Monitor Type : Hewlett Packard HWP - 16 inches
Network Card : Realtek Semiconductor Extensible 802.11b/g Wireless Device
Network Card : Realtek Semiconductor RTL8169 Gigabit Ethernet Adapter
Operating System : Microsoft Windows XP Professional 5.01.2600 Service Pack 2
DirectX : Version 9.0c (December 2008)

edit: drivers are up to date too