Freeze ups with 8ir533 board

[Shinnen]

Hi,
    I'm getting freeze-ups occasionally, right after window (xp) starts, but only from a cold start. I have checked the memory with MemTest, thinking that I might not have resolved my previous mismatch ddr problem, but it tested OK. I'm wondering if the PSU might be wrong. (I built the system myself and used an Okia 420watt PSU.) Any suggestsions would be appreciated.
Thanks,
...... john

[absic]

Hi John,

can you post your full system specs., HDD's, DVD/CD drive(s), Memory, Graphics Card etc. as your post is a bit vague.