WIN 7 (64 bit) Desktop. Recently I have had a poweroutage. This didn't cause any "major" problems. I had Firefox open (.exe) and another program (.exe) open. Both of these experienced issues. Firefox I wasn't too bothered about. The other .exe program I was. I solved the problem by using the "compatability wizard" and ran the program from there. Although it would not "save" in this mode, so had to keep going through the wizard when I had to use this .exe program. As I was putting together my "uninterupted power source", I had another poweroutage !!!! Once again I had the .exe program open.....and now I have MAJOR problems. The program (although would not start in the normal way already) now will not start via the "compatability wizard" either. As it was a "power outage" I initially thought, Regisrty problems or hard drive problems. So far I have..... Performed a System Restore to a previous date Tried a Registry Repair (Regsofts software). Tried an .exe registry fix program (I can forward that as an attachment if required) Check Disk Scan and Repair Unistalled and Reinstalled the .exe program All have resulted in "nada" ! I have installed the .exe program on a NetBook (Win 7) and an older laptop (XP) and the program executed perfectly first time on both of those machines. Being that I have checked the program works, checked the disk and done a registry repair....what else is there I can try ??? Or have I performed these "repairs" incorrectly ??? I am on Day Two of this problem.....and have spent 16 hours solid on trying to figure out what else I can do, so ANY and ALL help well be GREATLY APPRECIATED indeed. P.S. The .exe program is a small data collection application that sits effectively between a data provider and a trading platform and is pretty small (in terms of what it does). P.P.S. And I am running out of hair to pull out !!!!!