About the Disk Defragmenter, Disk Cleanup? Or no? Let me know what I should do. Thanks.
Presumably, Elizabeth23 was referring to these detailed and thorough instructions in Shenan's answer:
... when she said "please perform each step given in the link."
Granted, there is A LOT to do there! How far have you gotten?
If you would like other ideas, I can offer some, too.