HI I m shankar hear...i already installed windows 7 and can i go for xp now so that i can use both at one laptop...
If it then what causes need to take
Yes you can. What you will need to do is create a separate partition and install windows xp to it.
I dont know it this is allowed but here is a link i have used to do this in the past. Scroll down and start at the win 7 to xp