Thanks to many of you'll, Ive now got my PC setup ... E6400, MSI 965P Neo, 7300GT, 1x1GB 667 DDR2, LG DVD R/W, WD 160GB Sata and a decent case 
I started of by installing Vista RC1, but have now gone back to the tried and tested XP Pro ... yeah, lack of sufficient drivers was causing distress
Anyways, now that I'm back on track, I'd like to know a couple of things.
1) Every time I start my PC and log on, I get the following message ->
. Can someone explain to why that happens .... and more, what have I messed up that causes that!
2) On 3 occassions, my PC just restarted ... no its nots that virus that was prevalent a couple of years back .... and hence I was wondering if it had anything tho do with some hardware heating up. What software do you'll use to monitor temperatures? Do I have to keep monitoring temperatures or once I have it stable, I can ignore monitoring. ... and yeah, one more thing ... what are the standard expected temperatures for CPU, GP and HDD?
Thanks & Cheers!

I started of by installing Vista RC1, but have now gone back to the tried and tested XP Pro ... yeah, lack of sufficient drivers was causing distress

Anyways, now that I'm back on track, I'd like to know a couple of things.
1) Every time I start my PC and log on, I get the following message ->

2) On 3 occassions, my PC just restarted ... no its nots that virus that was prevalent a couple of years back .... and hence I was wondering if it had anything tho do with some hardware heating up. What software do you'll use to monitor temperatures? Do I have to keep monitoring temperatures or once I have it stable, I can ignore monitoring. ... and yeah, one more thing ... what are the standard expected temperatures for CPU, GP and HDD?
Thanks & Cheers!