Well, you're not really giving alot of info, now are you?
Ok, download the latest patch. It should be version 1.34, I think. Also, download the latest drivers for your hardware. You can also try running scandisk surface check to see if your hard-drive is working properly.
If that doesn't help, post your specs here, and tell me wether you just started playing divine divinity, or it's a problem that just kicked in.
Tovi 
