On a Windows Server 2003 or Windows Vista based computer, the upgrade of HP Print Driver hangs
On a Windows Server 2003 or Windows Vista based computer, when you try to upgrade HP printer drivers, it hangs at the finish window. If you try to restart the spooler, the following error message occurs:
Unable to install printer driver, Operation could not be completed.
For more information on this issue, including potential causes, workarounds, and resolutions, see: Microsoft KB Article KB953844.