Windows

1. Find for any "*.PWL" files and rename them to "*.WLP"
2. Click Start, point to Settings, and then click Control Panel.
3. Double-click Passwords
4. Click on User Profiles
5. Select "Users can customise ...." OK

In the same Control Panel:
6. Double-click Network.
7. Add any client network components, such as Client for Microsoft Networks or Client for NetWare Networks, and then click OK.
Restart the computer and here you go.

This is a common problem. There is a setting in the registry called autologon. It is probably set to 1 and should be 0. Such as autologin=0. I don't remember the exact registry key because I usually just do a F3 in regedit to find the autologon keyword. I have solved this problem dozens of times with this method. Good Luck!

While #1 is good advice, I'm with #2 to solve this specific problem..

Delete the following entry in the following registry key:


HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Network\Real Mode Net

AutoLogon=xx

Have you tried Control Panel/Users?

Check out Microsoft Knowledge Base Article Q141858 No Windows or Network Logon Dialog Box at Startup