I've got 2 1 TB. W.D. Caviar Black's in my pc checkdisk take's 3-3 1/2 hours for each one. As far as the Startup Repair a: It will show a Windows when it's finished and you'll have to click on eithe Restart or Yes for it to restart. It also may take more than 1 run of it. B: If you have an external hard drive attached to your pc, make sure it's turned off. As alot of time's the bios will automatically make that the 1st boot device, especially if it's a eSATA drive. Another words that's the drive Startup Repair & CheckDisk are both scanning, thus it'll take wasted hours, as Windows won't repair Windows due to it scanning the wrong drive. You also, may want to try a bootable virus scanner. You could've picked up an infection. Here's a article with links to download them. Don't waste your time with Symantec/Norton unless you have a product key for Norton Antivirus/360/Internet Security.
http://www.askvg.com/download-free-b...re-and-others/