After you upgrade to Windows XP, in addition to the expected Windows XP entry on the boot menu, you have a Setup entry. If you select the normal entry, Windows XP starts. If you select the Setup entry, the computer restarts, or Setup starts.

To resolve this problem:

01. Open a CMD.exe prompt.

02. Type attrib -r -s -h c:\boot.ini and press Enter.

03. Type notepad c:\boot.ini and press Enter.

04. Remove any line under the \[operating systems\] section that contains the word Setup.

05. Press Save on the File menu.

06. Press Exit on the File menu.

07. Type attrib +r +s +h c:\boot.ini and press Enter.

08. Close the CMD.EXE window.

09. Right-click My Computer and press Properties.

10. Select the Advanced tab.

11. Under Startup and Recovery, press the Settings button.

12. Use the drop-down box to select the Default operating system.

13. Set the time to display list of operating systems to a number of your choice.

14. Press OK and OK.