Just put together a AMD 3800+ Dual Core system.

Here are the specs revelant:

Boxed AMD 3800+ Dual Core CPU Using Stock Fan+Heatsink
2GIG Ram ( 2 x Super Talent, PC3200 1GB DDR400. CL2.5)
MSI K8N Neo4 Platinum. (Nforce4 chipset)
ATI 1800XL -256RAM PCI-E 16X.
450Watt Antec Power Supply.
Thermaltake Armor Case
WD 400GB SATA Drive.

Nothing is overclocked.

Problem is that after I finish installing windows, the next reboot, when is supposed to ask me to register, enter user names, ECT, the machine reboots.

I tried going in Safe mode, same thing.

I'm using a OEM just opened copy of Windows XP SP2 (legal )

Please help, I just spend a whollata cash on this rig for my christmas present and can't get it to work.