Windows account security identifiers (SIDS) were the subject of a warning issued by Microsoft for users and admins not to delete the sub-type in case they inadvertently break applications. It’s not clear what prompted Microsoft to issue the caution for a type of SID that has been part of its OS since Windows 8 and Windows Server 2012, but the implication is that a lack of awareness has been causing support problems.

Read full article on Naked Security