Where is the cleaner located on my PC

Huh? What cleaner do you mean exactly? What version of Windows do you have? Also - please don't double post. It's ANNOYING!

Anyway, did you mean one of these:

• Disk Cleaner
  
  Start >> Programs >> Accessories >> System Tools >> Disk Cleaner

• To remove cookies & temo files in IE
  
  Load up Internet Explorer. Click Tools >> Internet Options. On the general tab, press "Delete cookies". Then press "Delete Files".

• To remove cookies & internet files from Firefox (v1.5)
  
  Tools >> Clear Private Date.

A better way of cleaning your system is detailed HERE