I've been using vista for about a year and never had any problems. But now all of a sudden my SATA HD spins down and shuts off, forcing a re-boot to bring it back. HD passes all the SMART testing and is not overheating. Now for the weird stuff: I moved the HD to another port.....it works with no problems. I installed an additional disk to the port that was causing the problem.....no problems. Has anyone else had similar problems and will it keep happening?