Restoring your computer will only reset it to earlier settings; it will NOT remove any personal data.
You do not want to wipe (remove all information from) your computer because that will also remove the operating system and you'll have to reinstall it.
If you added programs you want removed, go to the Control Panel and select Remove or add Programs and remove them individually from there. If you want to remove documents or pictures, go to My Computer, select the "C" drive and then delete the contents of the My Docs and My Pictures directories. Look through other directories (music, etc.) and delete whatever you want gone. Go online and in your browser toolbar select Tools, Internet Options, Temporary Internet Files and Delete temp files (then go back and delete cookies, then settings) and then just below that in Internet Options select Clear History.
Next run Clean Disk and remove to remove any unneeded remaining files. Then use your Defrag utility.
Defrag the hard drive; then Defrag it again. Do it a third time just to be sure. By this time, everything should have been trashed beyond restoration except by a computer forensics person.