This one really has be baffled.
Win loads just fine, but after about 1 min of activity the desktop freezes. Keyboard and mouse are ok and the only window I can open is task manager.
Changed memory several times. Updated graphic drivers. Tried another psu, cleaned cpu heatsink which brought temp down from 88 to45c.
The install is a 'pirate' copy of Win UE. (most are over here).
The only hint I've found is when booting to PM8 cd and I've found that the p[artition is improperly mounted.
Even a 'repair' install didn't solve it. I'm tempted to zero the disk and start again.

and yes, I've Googled this one