Hello,
Today I just sold my old CPU, Motherboard, and GPU to a friend. It is a Xeon X3570, AsusP7P55-E, and R7 260x. The system ran great for over a year for me and I loved it. We overclocked it and did some testing while in my case, then transfered it into his case. And when we did that, booting off his HDD it got into the BIOS fine, but when the system tried to boot windows, I was left with a blinking cursor. After a few hours of basic troubleshooting I brought the system back home with me and put my ssd back in it, and windows booted right up! I'm actually on it right now. Other than reinstalling Windows on his hard drive, do any of you have any idea what might be causing this issue and how to fix it? His Hard Drive was previously installed in his old system and worked fine. And after booting on my SSD, I can view the HDD as a second device and everything looks fine. I know the easy answer is to reinstall Windows but that is really not an option. Any Insight would be much appreciated. Thanks!