Stuck during upgrade to 20.04

I am trying to upgrade my 18.04 LST system to 20.04 and the upgrade has got stuck, the cursor is frozen and there is no reaction to anything at all. I am unable to open the terminal.

Should I force it to reboot? The system is a Dell Inspiron with Ubuntu preinstalled.

Thank you


My solution: I did force reboot. Boot in using an older kernel in recovery mode. In the menu displayed I chose first 'dpkg-repair broken packages' after a while the process finished and after rebooting I was able to enter into the upgraded version of Ubuntu.