When Acrobat is initially installed or updated, to create the Adobe PDF PostScript printer driver instance, the Spooler Service is temporarily stopped and then restarted. But once that occurs, Acrobat itself absolutely never accesses the Spooler Service at all! Even if the Acrobat installer / updater was unsuccessful in restarting the Spooler Service, rebooting your system would restore it (or of course, you could manually restart that service via the Windows System Management Services console.
- Dov