I have just spotted in the Event Log for this site that about 20 user accounts were deleted within the last hour. The event details are as per below, however I can't find any Scheduled task that wo...

On Saturday (20th) I applied hotfix 9.0.51 to the local version of this site, without any errors or warnings. Since then, on my local site version, have been creating content, checking in/out, publ...