I have Windows 7. It happened with XP Pro, and Vista Home Premium as well. I thought that Win 7 Premium Home Edition would alleviate the problems I had which it did EXCEPT for the hl2.exe thing
***NOTE - I do save the whole file on a back up system as it's a stand alone program and did reload it from the backup when I did the clean install for Win 7 on 2 new raptors in raid 0... Don't know for sure but that really shouldn't make a difference IMO
DED