Hi,
Apologies, Got to do it only now, due to work.
If you have a Timeshift snapshot already taken, go into Update Manager and look at the updates presented to you. Unclick (deselect) all the ones pertaining to Grub if there are any. Then do those updates. Use the computer for a day or so. If all is good, take another Timeshift snapshot and then do the remaining updates. If you get that error message again and you are able to back out, please do back out and post back here.
As @mikeflan suggested, took a snapshot.
Deselected the Grub2 update suggested by Update Manager.
Shim and Shim-signed are also suggested.
When I clicked Install Updates, I get the following message, with title "An error occured":
Code: Select all
E: dpkg was interrupted, you must manually run 'dpkg --configure -a' to correct the problem.
E: _cache->open() failed, please report.
Any help appreciated.
Thanks a lot.