You probably need to clean them out more thoroughly. in your printer settings, check the ports they are assigned to. if there are two virtual Adobe PDF ports, remove one of them, then attempt to remove the redundant printer itself.
Sorry, I totally forgot to mention it is W7 64bit !
there are no ports assigned as far as I can see...
what I see: at PDF (Copy 1) are 5 printjobs waiting, but I cannot cancel them...
Go to Start - Run - Services.msc. Right click on "Print Spooler" and click on Stop. Then delete the pending printjobs from Adobe PDF Copy 1. Then delete the Adobe PDF Copy 1. Restart the computer.
Moving this discussion to the Printing & Prepress sub-forum of the Acrobat forums.