If you have ever noticed that when you install a printer as an administrator it doest not carry into all other newly created accounts? Try this fix.

Installing Printer for all users in Windows 7

Log in to the workstation as local administrator
go to a command prompt
type the following (case sensitive)
rundll32 printui.dll PrintUIEntry /ga /n\\otsrv3\hp4250n-wic
net stop spooler
net start spooler