Well first of all always check microsoft.com.
Try to follow this link and do all that it says.
If that dosn't help come again.
'Windows Vista Help: Check your hard disk for errors'
(
http://tinyurl.com/yrv454)
especially notice this section:
To automatically repair problems with files and folders that the scan
detects, select Automatically fix file system errors. Otherwise, the
disk check will simply report problems but not fix them.
did you try that.
no teasing honestly.
it is normal to forget the most obvious.
/eph