after u try the others try these
- check is all options in dxdiag are enabled
- run chkdsk to fix any probs with the files in the games folders . since it restarts , could be more files got corrupted after first restart
- r they pirated versions of the game ?? more pirated versions have glitches when going into certain levels ,especially those that have higher graphics details . doom might be working and might be pirated too , but this prob is for some games not all
- for the above problem , try to download the save game for that particular level or the next level . not sure if u can get that for nfsu2 , but that worked for me while finishing batman:vengance
- are all display drivers updated ?? try downgrading if it helps
- make a user acct in xp without fancy eyecandy and most services and keep it only for games .
- ur config is given as 2600+ barton running at 2.2ghz . r u sure its barton ??? i have the same processor running at 1.9ghz which is what is specified in their website . check how much l1 , l2 cache u have that will determine the exact processor u got .
- try using everest home edition to show the correct temp for m/b, hdd and cpu
- try changing ur agp apeture in bios . i think it should be 1/2 or 1/4 of video capacity . u can read up more on agp settings from google/teoma search
- check the games site / readme file for particular error u might be getting .
- try reducing the video settings for those particular games