Damn Error

[kaiweiler]

Hey I get the dreaded Blue Screen of Death after playing CS Source for around half an hour. Then my computer restarts.
Hex code is 0x4020000000000000

I tried looking up the hex code but I couldn't find much of anything useful.
Any help??

Thanks

EDIT
Running Vista 32bit
X2 3800+
Asus x1550 using catalyst 7.9
1.5gb RAM

[keymaster2]

its a bad memory conflict,microsoft flight simulator x does it to

do the right thing put xp pro back on
problem solved

[Chewie]

its a bad memory conflict,microsoft flight simulator x does it to

do the right thing put xp pro back on
problem solved

No, problem avoided.

[Gregor847]

delete this msg pls