When I installed Ubuntu a year ago, I created a partition (alas) on which I kept Windows, just in case. I've been booting in Windows extremely rarely because I work from Ubuntu only. Two days ago (alas again) I booted in Windows and naturally a ton of updates were waiting for me. So I did the updates choosing "Update and shut down". After that shutdown, however, both Windows and Ubuntu are failing to boot. Windows freezes in "Preparing Automatic Repair" and Ubuntu mostly just gives a black screen (sometimes it says "TPM interrupt not working, polling instead) although I did reach the purple screen twice, managed to enter my password but then it froze.
In UEFI, the computer (HP Zbook mobile workstation, i7) passes the system fast test, on the extensive test it passes the short DST check but freezes on the optimized DST check.
A boot through advanced Ubuntu options/recovery mode also doesn't work (it runs for a while giving error messages like kernel panic, etc. and then freezes).
I've created a live USB stick (which works, I've just used it to install Ubuntu on another computer) but also that won't boot, not even in the safe graphics mode, it starts booting and then freezes. (I've disabled Fast Boot in UEFI).
Is there any way this can be solved? I haven't done a back-up in a week and if nothing else I'd like to recover some of the data from that disk.
Thank you very much for your time.
