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Protecting User Privacy at Logon Prompts

Normally, at the time of logging into a Windows system, it is possible to find out information on the last user since his/her details are stored in the cache memory. It is always a good security and privacy practice to prevent this information from being displayed by executing the following registry tweak:
1.Open the regedit. axe file.

2.Search for, or create, the following registry key: For Windows 2000 or XP:
HKEY_LOCAL_MACHINE/SOFTWARE/Microsoft/Windows/Current Version/Policies/System
For Windows 95,98 or Windows ME:
HKEY_LOCAL_MACHINE/Network/Logon
For Windows NT:
HKEY LOCAL –MACHINE/SOFTWARE/Microsoft/WindowsNT/Current Version/Winlogon

3.Create a new DWORD value (within the above registry key) called DontDisplayLastUserName and set its value to 1 to prevent the last username from displaying, and to 0 to implement the default settings.

4.Exit the Windows registry and restart the Windows session for the change to be applied.It is also possible to implement the above by simply creating and executing a.reg extension file containing the data below:
REGEDIT4
[Registry Key depending upon Windows version] "DontDisplayLastUserName "= "1"