Boot into the one you want to keep. If the two Windows are in the one partition, eg. C: drive then there will be Windows and Windows(2)- identify the surplus windows [best if it is Windows(2) because that (2) will carry over into other stuff....] and delete its Windows folder. Transfer any documents you might wish to keep, [copy...]. Delete the folder doc n setts(2). Now go Start > Run, paste:
control sysdm.cpl,,3 -and press OK.
Select Settings in Startup and Recovery, press Edit for the startup options; in the notepad that pops delete the line that corresponds to the unwanted Windows, [check that Default entry matches the remaining Windows], Save it.
right click my computer-properties-advanced-start-up and recovery-settings-click edit. delete everything after the first fastdetect. everything after that is your second installation and no necessary. If you see noexecute=optin after fastdetect, you can leave it if you like...I would not.
Do you mean you have 2 XP installs or do you mean it shows 2 installs to choose from during the startup process?
The answer to this will be very useful information indeed as sorting either requires a different fix.
at first delete one win xp installed driver & right click mousee on my computer
& go advanced then u can see startup & recovery option there has a setting
button click this & there u can see default opoeratinmg system & from edit manu delete
removed win xp name. ok