Adobe Acrobat XI crashes after few seconds

What's the exact version number of the application? What's your OS version?

Acrobat XI is an old and unsupported version, and is getting less and less compatible with Windows 10 with each new update of the latter. To increase the chances of it to work properly make sure you have all updates installed (up to 11.0.23) and run it in Compatibility Mode with an earlier OS, like Windows 7.

Updates are available here: ftp://ftp.adobe.com/pub/adobe/acrobat/win/11.x/

(Note you can't open this link in most browsers. You must use a dedicated FTP client)

If you're trying to install it on a new Mac computer it's a lost cause. It can't run on it.

Is this happening in a MS Windows 10 computer?