Completely remove all printer drivers Win XP and 7

Check in Control Panel | Add/Remove Programs; if there is an entry relating to one of the printers, select it, then click Change/Remove. Follow the dialog and "uninstall all" or "remove all" as appropriate. Some "printer software" have programs that show up here and it will be a good idea to remove those before going any further.

If the Print Spooler service is operational:

• Open the Printers (Printers and Faxes on Windows XP) folder
• delete all of the printers
• click File, Server Properties
• select the Drivers tab
• for each entry:
  • select the entry
  • click Remove
• open regedit (e.g. click Start, key regedit and press Enter)
• navigate to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Print\Environments\Windows NT x86\Drivers under this key, there will be the keys Version-2 and Version-3 (one or the other of these may be absent - not a problem) the sub-keys under these contain the printer driver configuration information delete all the sub-keys inside Version-2 and Version-3, but not these keys themselves
• open a Command Prompt window
• key the commands
  net stop spooler
  net start spooler
• open Windows Explorer & navigate to %systemroot%\system32\spool\printers\ and delete any files there. By default, this is where the print spooler stores print files.
• navigate to %systemroot%\system32\spool\drivers\w32x86 (%systemroot% is usually Windows, but it might be winnt or something else; this is set when the OS is installed).
• inside w32x86, there will be folders with the names 2 and 3 (one or more of these may be absent - not a problem)
  delete all of the files and sub-folders in each of the 2 and 3 folders, but not the folders themselves
  inside w32x86, there may be other folders with names starting with "hewlett_packard", "hphp" or something else; delete these folders also
• restart the print spooler (see steps 8 and 9 above).