New to this forum and looking for help..although I think I already know the answer based on what I have seen here.  My wife was working on our pc the other day and she got the blue screen of death with the error message can't write to c:drive. Since then the ScanDisk starts up everytime I boot up the computer, whether I shut it down correctly or not.  I have run all the diagnostics and defragged the hard drive and suddenly the ScanDisk is picking up an error on the disk. I tell it to fix it but it just sits there and runs and runs and gives me the same message about every 2 minutes. The scan doesn't seem to progress any farther.  I have uninstalled most unused programs and backed all files up, but I am wondering if it would be worth trying to reformat the hard drive or if is sounds like it is going bad.  I can still use the computer, but it runs fairly slow and sometimes takes 4 or 5 tries to boot up.  Any suggestions?

Thanks!!