PC Lockups! Dammit!

I need to figure out why my freakin' PC locks up at the most in-opportune times! Last night I had this really nice, (and long) elegant (not to mention eloquent) post almost finished when my system froze up (!) and I lost EVERYTHING! I had written over a fucking HOUR! At least! About a whole range of stuff. I've got to find some time to get to the bottom of this! Sometimes I can go for days with no freeze ups. Other times the fucker does it once an hour(!) I'll fix it dammit! Pisses me off! shit! As a result though, THE RESULTING POSTS (smaller bytes) probably will not be as eloquent. But I AM saving more often! Dammit!