Download the xp_nomsconfig.vbs file: http://www.dougknox.com/xp/scripts_desc/xp_nomsconfig.htm and save it to your Desktop (you may want to right click and use Save Target As). Double-click the xp_nomsconfig.vbs file after closing MSConfig. You will not see the Selective Startup screen on the next boot.
In the right pane, delete the value for MSConfig. Alternatively, you can use a small VB Script file to do this for you as well.
Copy the following three lines to a Notepad file and save as No_MSCONFIG.VBS
On Error Resume NextSet WshShell = WScript.CreateObject("WScript.Shell")WshShell.RegDelete "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MSConfig"
After running MSConfig, run the VBS file and this entry will be removed automatically.