Stuck on updating boot files?

My CoreElec has just done an update. It has extracted the file and done checks. It says ‘updating kernel 100%’, ‘updating system 100%’ and is now updating boot files. Except it’s been doing this for almost half an hour. Should it take this long?

[Edit] It’s now been an hour and it’s still updating. This can’t be right, surely?

[Edit] 1.5 hours and counting…

OK, just shut it down and rebooted. Appears to have fixed itself.