there is most likely a job scheduled to a print device. I have seen this
with the Office Document Writer and other real and virtual devices that are
not online.
When the spooler has been stopped
net stop spooler
copy the contents of \windows\system32\spool\printers to another location
(or delete if you do not need any of the spl files.)
net start spooler
Open the printers folder, you will most likely see some printers there.
Unsure what the HP Desktop is but you should be able to install the printer
now.
