Yes, its Windows XP Pro with SP2. I defraged and ran "regclean", but no success. I also tried to run "sfc /scannow" and "msiexec /regserver", but "msiexec /regserver" didn't do anything. "sfc /scannow" ran, but didn't do anything to fix the problem. I built my computer myself, It has an AMD 1.60 GHz processor with 1 gig of ram and an Nvidia 6600 graphics card. I shut down all of the background programs befuore starting the install, so I don't think that that's the problem. It also happens whenever I try to run something with a setup.exe file. I've tried to install the same game on my other computer, a Windows XP Home with SP2, and it installs fine. Is there some vital file that I could be missing or some setting that I could have changed? Thanks. I took a screenshot of the files. You can see it here: http://img460.imageshack.us/my.php?image=i...reenshot4jx.png . I'm trying to install the bf2_editorsetup_aug02 . When I run it, it just exits without installing. I ran the Audacity Setup that you see in the top right, and it ran just fine. Is there a difference in these file types?