|Go to a cmd prompt.|
type chkdsk /r or /f [you don't use both. /f is a file system check whereas /r includes /f but also tests the surface media of the hard drive]
answer yes to the question of run at next boot
reboot so it runs.
then go to accessories/system tools and run disk cleanup with everything checked.
then go back to accessories/system tools and run defragmenter.
Now you system will gain some speed
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