If you have installed window XP on different partition or replaced the old window with new installation. Due to that you might have multiple entries for booting during startup representing those multiple windows. With the presence of multiple entries the computer cannot open the window directly at startup unless one entry is chosen. Below are the methods that you can use to remove multiple booting entries, you can remove the entries you dont want and keep one representing the operating system you want to use ; 1st method: Right-click on My Computer and choose Properties from the context menu. The System Properties dialog box will open. In the section Startup and Recovery click the button Settings. To delete the unwanted operating system from the boot display menu, use the Edit button on the right of the entry. 1. 2. 3. 4. 2nd method Open Start-Run and enter msconfig Click the tab BOOT.INI The contents of the boot.ini file are shown and a number of configuration settings are available. Under Operating systems, delete the one you dont want. Be careful not to delete the wrong one. 1. 2. Note Be careful while editing those entries Master boot record , once you delete all entries your computer wont open the window at startup. Source: Removing windows multiple boot option in win XP AfroIT Blog-Wazee wa mididi!