Hya, got a problem with the demo. it was running great with 512mb ram, but the other day, the computer upgrade guy comes round with another 512mb ram stick to replace the old faulty one (should have been 1 gig) and brings the ram up to 1 gig, anyway i was playing and it was all fine for about a day but now whenever i play it it will freeze up and do nothing at all even alt-tab and alt F4 or ctrl alt delte cannot end the program, i just have to restart. i'm really hoping its not a memory error because everything else runs fine, (watching DVDs etc) I've tried BF2 and that works fine. anyway you might want my specs so here goes:

AMD sempron 3100+ 1.8ghz
Geofrce 6200 256mb
1gig ram

i think all drivers are up to date. (how do i check graphics ones i used to know but i need to know if i'm using 91.31 or the latest ones.
Thanks