Scandisk tells me I have an error and, once it begins to
repair it, I get another error that says "An error
occured while scan disk was attempting to correct the
previous error. Complete a thorough check of this drive,
then run scan disk again and choose to conduct a standard
test". When I do this I get another error that
says "Scandisk must now restart because another program
(or Windows itself) wrote to your disk. Any errors that
were previously reported, but not corrected may be
reported again."

I've tried to rerun scandisk and get the same exact
error. When I try to go on to defrag I'm told that I
can't because my disk has errors. Any suggestions?