This happened to me this morning, so thanks for posting this. Interesting to see that this sort of thing does happen to the moderators as well as us normal folk!
I had to ununstall the security update, but then upon reboot the system appeared something again although the latest update according to update history is Cumulative Update for Windows 11 Insider Preview (10.0.22622.575) (KB5016694) on Saturday.
The only update today is a definition update (Security Intelligence Update for Microsoft Defender Antivirus - KB2267602 (Version 1.373.383.0)) but that would not require the machine to restart twice as I witnessed.
I have disabled Windows Update, which still appears to be the most dangerous and globally costly computrer virus in human history.