Hi mikewall01,
a simple destroyer of addressbar cache in ie6 and up, on xp etc. ; Tools/Internet Options/ Content tab click on Autocomplete; in the dialogue box, uncheck 'Web adresses' - also forms, and passwords if you want to. To do a regular deep clean of all these caches and your 'index.dat' which keeps a record of every website you visit, download Sweeper by Emery [freeware] It will clean as few or as many superhidden spyfiles as you want through their Options box. I use this weekly and it is safe. :-)