os/windows/ AdobeReaderDisableUpdates

Adobe Reader updates are very annoying as they: a) require a reboot to take effect; and b) you can't start Adobe Reader until you reboot; and c) you may not want to reboot. Thus if in the interim you want to view PDFs, you have to resort to using a web browser.

See here on wintips.org. Summary:

1. Open Task Scheduler
2. Select Adobe Acrobat Update Task