Login Issue after recent update

So after the latest update things went haywire. After rebooting the laptop it would either go blank screen after typing in the password for the username. Also the fans went crazy:

Or, go crazy about the fingerprint reader and constantly try the fingerprint reader on my machine (which btw the hardware is not even supported), thus failing all login attempts and locking me out:

Can anyone help me out on this one ? Have no clue where to start, and this is my work laptop, so it’s rather urgent. Thank you all for your help.

This (Only the pointer visible after login (GNOME)) solved the issue, apparently some extension is broken (suspect it’s dash to dock), as enabling extensions after being able to login crashed my DE.

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