When I went to defrag the computer, I got a message that chkdsk /f needs to check the volume first. So I open a prompt and typed in chkdsk /f and was told that it is being used by another process. Do I want to have it open the next time I start the computer and I said yes.
However, the next time I started the computer, I got the same message: chkdsk /f is being used by another process.
Until I get this chkdsk /f issue resolved, I can't defrag my computer.