I would suggest uninstalling, then deleting your temp folders, and clean your registry, do a disk clean up. Then try to reinstall. Also your extension is diff from mine, idk if its because i am still on vista, but mine says sai.exe. Also check to see if you have more than one Sai folder, they could be conflicting with each other, i am only speculating though, not sure. I hope you can get it resolved.