after I shut down, it cold boots itself back up 10 secs later

[AlwaysWong]

Title pretty much says it all. This is a brand new system that I just finished putting together. Here are the specs:

AthlonXP 2000 (not overclocked)
MSI KT3 Ultra2 mobo
256MB DDR (2700)
Antec True430 power
ATI Radeon 8500 LE 64
Turtle Beach Santa Cruz
WD 80GB 7200 rpm (2MB cache)
Linksys 10/100
Win2K Pro with all service packs

So, I shut down and although it takes a little while, it powers itself down fine. I get up, start to walk away, and all of the sudden it boots up! The system's been together for less than a week. This just started happening the day before yesterday. What could be causing this? Thanks.

 

[amdskip]

There may be something under the power settings in the bios about auto on or to turn on if power is restored. Read up in your motherboard manual and see what it says.