Hi How to change a operating system from my DELL Vostro.Presently I am using windows XP and I would love to change it to windows 7
1) Why do you want to change from XP to windows 7?
What do you wish to accomplish?
2) If your hard drive space requirements are small enough, consider first replacing your hard drive with a SSD. It will absolutely transform the performance of your PC.
3) Be prepared to lose the hidden xp restore area on your hard drive. Not a big deal, I think.