The following are the main differences between Win-XP and Win-7:-
Window 7 is much bigger in size then Win-XP.
The Price of Win-7 is higher then Win-XP.
Win XP can be easily run on normal P-III with 256 MB RAM, but Win-7 required atleast 1 GB RAM.
Your old device like Printer might not work with Win-7(because win 7 required special drivers for it).
The speed of Win-XP is much better then Win-7.
The main disadvantage of Win-7 is that some XP based software not works on Win-7(like Outlook Express).
If you are using XP then it will be better continue to the same. But most of the new systems are coming with Win-7 because support of Win-XP is discontinued by Microsoft.
Yogesh(Mob: 09418024435)