Last week, I installed a new 3TB drive in my system. In addition, I have 2 other drives, a 1TB (system), and a 320GB. On Sunday night, I installed some windows updates and rebooted. That's when I started to get the MBR Error 1. I booted off the install disk to run utilities, but that wouldn't work until I unplugged all other drives (received an error that it wasn't compatible with my version of Windows). Once I unplugged the other drives, I could boot into Win7 no problem, but I still did the utilities to repair, then I re-wrote the MBR. Plugged the other drives back in, MBR Error 1. :\ So I bought a new SSD, installed Win7 last night. But when I plug my other system drive in (planning to reformat it and use it for storage), it boots off that drive instead. :hmm: So I then plugged the new 3TB drive in and MBR Error 1. Two questions: How do I boot off my SSD to reformat my old system drive? Is my 3TB causing all the MBR Error 1 problems?