Not as ''Portable'' as I thought (aka...Registry Problems)
I recently stumbled across registry settings that were left behind by my various portable apps (located on my external Seagate e:\)!!!
This caused me no little concern since I use them daily at a location on a machine that I really would prefer to leave no trace behind. Why is this occurring?
To repeat my findings, open your registry editor (Start-Run-regedit). Figure out which letter your external drive is registering as and run a search within the editor (Ctrl+F) and type "driveletter:\" obviously replacing the text of driveletter with whatever it happens to be.
I guarantee you'll be surprised what pathways and stuff is left behind.