Eventlog Type: Security
Eventlog Source: Security
Event ID: 637
Link to KB Entry
Short Description:
Security Enabled Local Group Member Removed
This event record indicates that a member has been removed from a local group. This event also occurs when a user account is deleted and removed from the built-in None group used internally by Windows 2000. There is no Failure Audit form of this audit event record. Removing members from groups can have security implications. This is especially true when a user is removed from the Administrator group.
Security Enabled Local Group Member Removed