A week ago Windows broke all of a sudden where it wouldn't boot. I took my laptop to the university tech store to get the hard drive wiped and Windows reinstalled, but they said that the hard drive had errors and was slowly failing and they refused to reinstall Windows. I didn't trust them because Windows was working great before and I had been using Ubuntu fine after Windows broke. So I installed Windows 7 last night but it didn't give me the option to do a full reformat. Right after Windows rebooted I did a scan for errors, with the box checked to automatically repair them. I stayed up late enough to see that there weren't any errors in the used part of the drive. Unfortunately the next morning Windows would not report if it had found any errors in the free part of the drive. Should I leave my Windows installation as is or should I do a full reformat with some program and reinstall Windows?