Adobe Acrobat Reader - Windows

Hi @Marc280846307tyg 

Sorry to hear about the trouble caused.

As mentioned, a couple of users are experiencing the same issue. Is that an enterprise deployment?

Have you recently updated the application or installed the Windows update?

Please ask the users to try the following steps and see if that helps:

Navigate to Reader>Menu>Preferences>Security (Enhanced)>disable "Protected Mode at Startup" and "Enhanced Security">OK>Reboot Reader.

Note: these changes are only for testing purposes. Once tested, please change it back to the previous setting. 

If it doesn't help, then, 

Run this cleaner tool to remove the existing installer and application’s file traces:

https://www.adobe.com/devnet-docs/acrobatetk/tools/Labs/cleaner.html

Download the Acrobat Reader installer from here:

https://get.adobe.com/reader/enterprise/

Thanks,

Akanchha