first try running run chkdsk /r
NOTE the single space before the /
WARNING... Microsoft does not recommend interrupting the CHKDSK process when it is used with the /r switch, and Microsoft does not guarantee the integrity of the disk if the CHKDSK program is interrupted.
if for any reason you can't run chkdsk /r or it wiil not complete you will have to try running manufacture specific testing tools
pick the tool thats made for your particular drive and always use the long tests if offered
for Western Digital drives go here
Use the Find by Model Number on the right side
for Seagate and Maxtor drives ...get seatools here
for Fujitsu drives go here
for Hitachi drives go here
for Samsung drives go here
Toshiba does not provide diagnostic tools for their hard drives...
Toshiba Hard Disk Drives and Optical Disk Drives purchased as part of a complete system are warranted by the system OEM. Please contact your system manufacturer for further details. 2.5" Hard Disk Drive ("HDD") products purchased in the United States and Canada from Toshiba authorized distributors carry a 3-year limited warranty. 1.8" Hard Disk Drive ("HDD") products purchased in the United States and Canada from Toshiba authorized distributors carry a 1-year limited warranty.
If the drive passes the hard drive tests... try running chkdsk /r again ...it can fix small problems with system files
nojoy...try formatting the drive prior to a reinstall of the OS