Go to services: Start -> Run -> services.msc, find print Spooler service, right click and go to Properties. Check the path to see if it is C:\Windows\System32\spoolsv.exe.
Go to system32 folder and check for spoolsv.exe file, if is missing go to C:\i368 and search for spoolsv.ex_, copy that file and paste it in system32 folder and change the name to spoolsv.exe.
Go back to services and start the print Spooler service.