Q: Like pictures, videos, and music Because I am selling the computer and I don't want them to have me personal stuff on the computer.
A: The bigger question is, do you want to remove it so No-one can ever find it, or remove it so you can't see it? The other postings tell you how to delete the file. But since you have made it to a web site, I anticipate you would know how to do that. Anyone with some basic software recover tools can find the files you have deleted from your drive. Use a program that kills it, then makes it unreadable by anyone (even forensic software). Try http://www.softpedia.com/get/Security/Secure-cleaning/Free-Wipe-Wizard.shtml