For those of you running Windows 11, Microsoft have just released a cumulative update that caused me problems. I had to perform a System restore to get the taskbar and other functions back.
Others have reported this problem, so it’s probably best not to update with KB5006050. I’ve paused updates to prevent this problem happening again, and I’ll probably wait until Windows 11 becomes generally available before updating again. For now, I’m going to stay on the safe side.