I have some HP DC7900 desktops running XP 32. They are using Intel Core2 Duo CPU E8500, which is supposed to be compatible with both 32 and 64 bit OS. I want to upgrade these to Win7 x64. I have run the Win7 upgrade advisor, and it shows that I can upgrade to Win 7 x64. The only issue it shows is that the Ethernet driver is not compatible with Win 7. \r\n\r\nSo I grabbed the updated Ethernet driver and performed a custom install of Win 7 x64. I lost video just over half way through the installation. I tried to force the computer to come up in safe mode but nothing.\r\n\r\nI confirmed that the system bios was up to date, before the install so I don't see that being the problem. \r\n\r\nThis only happens when trying to go to 64 bit, I can install 32 bit with no issues.\r\n\r\nHas anyone ever seen anything like this before? Any suggestions greatly appreciated.