Enable a Warning Message During Windows Logon

Serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs.

Click here for Backup and Restore Registry

To enable display of a warning message, make the following changes in the registry:

1. Start Registry Editor (Regedit).

2. Locate the HKEY_LOCAL_MACHINE subtree, and then go to the following key:
SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon

3. Add or modify the following values: