Dear Colin,
- Run in Compatibility Mode:
- Right-click on the Adobe Reader shortcut or executable and select "Properties."
- Go to the "Compatibility" tab.
- Check the box for "Run this program in compatibility mode for:" and select a previous version of Windows (e.g., Windows 8).
- Click "Apply" and then "OK."
- Repair Adobe Reader Installation:
- Open the "Control Panel" and go to "Programs and Features."
- Find Adobe Reader in the list, select it, and click "Change" or "Repair."
- Follow the on-screen instructions to repair the installation.
- Clean Reinstallation of Adobe Reader:
- Uninstall Adobe Reader.
- Download the Adobe Acrobat Cleaner Tool from the official Adobe website to ensure all remnants of the program are removed.
- Reboot your computer.
- Download and install the latest version of Adobe Reader from the official website.
Best Regards,