Update icon appears on desktop
Hi, opened my MacBook Air (2020) this morning to find a message stating it had to be shutdown/restarted due to an error. Asked for a report assuming I could forward to Apple. Report generated but I can't understand it and no button to send to Apple, Closed it.
Then found a disc icon named "Update" on my desktop. Did a "Command I" to get info: provides my HD info, but nothing else.
Decided to trash it, and it simply disappeared - eject? Then decided to do a "Restart" the process looked like a shutdown/install.
Has now restarted and the "Update" install icon has reappeared.
What should I do with it? is it bogus or Apple?
MacBook Air 13″, macOS 10.15