Well, I uninstalled the game, restart PC, remove folders, clean registry, restart pc, clean registry once again to be sure. Then installed game, installed shivering isles, apply 1.2.0416 patch. DL and apply obse + weOCPS and start via obse and still crashing after 30sec playing. I tried many combinations of video settings - lowest, low, higher, with/without AA, bloom or HDR. I'm starting to think it will be best to reinstall windows..