Windows choice!

Hi,
I have a Gateway,
Core 2 Quad 2.4GHz CPU
x86 Chipset
3.00GB DDR2
8500GT GPU
400W PSU
SATA HDD

running on Windows Vista 32-bit
My problems are generally random freezing, particularly around UAC security checks. I have turned UAC off, for the time being, however; the problems continue in other areas of operation.


any advice ?