Hi lawrencew78647297,
Please try the follow steps and let us know:
1. Launch Acrobat, Click on Help menu > Repair installation (Make sure everything else is closed).
- Restart the machine and then try updating it again.
- If the automatic updating didn't help again.
2. Download the update patch manually and try installing : Adobe - Acrobat : For Windows
3 If above steps didn't help either
Download new installer. : Download Pro or Standard versions of Acrobat DC, XI, or X
Uninstall Acrobat XI using cleaner tool : Download Adobe Reader and Acrobat Cleaner Tool - Adobe Labs
Reinstall and try updating again.
Regards,
Tariq Dar.