Hi. I hope you can help. We have a situation with a friends HP desktop running Windows 7. Link to his make/model desktop... http://tinyurl.com/b4yk2ev The computer starts up to "boot disk failure please insert disk press enter." This is a 500GB Seagate SATA drive. I tried a "repair start up" and it didn't help. I then took the hard drive out and connected it to a dock, but the drive only shows up occasionally in My Computer. When connected and briefly recognized it will say that the drives needs formatted. When trying to format it says the format failed. I also got error 0x80300025 at some point. The drive will show up in disk management and it comes up as unallocated. So I took a 160GB working drive out of another HP computer running Windows 7 and put it in the computer that is having the "boot disk failure please insert disk press enter" issue. This 160GB drive came from a HP slimtower model s5220f, located here... http://tinyurl.com/b9ldaa9 The 160GB drive is also made by Seagate. After placing this known working drive in the problem tower it wouldn't boot to Windows and it went to "Start up Repair" went through that and came up with "Start up Repair cannot repair this computer automatically." I thought that was odd. I thought this working drive would allow the problem computer to boot right up. I thought the 500GB drive was toast, but now that I put a working drive in the bad tower and I still have an issue I'm not so sure. Is this a BIOS issue? CMOS? I am running the F9 HP diagnostics and the AMD CPU passes, the memory passes, and the 160GB hard drive passes all tests that includes "boot path." I'm stumped. Help in this matter is greatly appreciated. Thank you.