Installing XP On a Pre-Installed Windows Vista Computer
DI reader Suresh Telu has a Lenovo laptop that came pre-installed with Windows Vista Home edition.
He plans to install Windows XP on the computer but wiping off Vista completely may void the laptop warranty.
Suresh is therefore looking for an alternate solution where he can install and dual boot Windows XP alongside Windows Vista.
It is possible but before you install Windows XP over pre-installed Vista, here are some important points to consider:
1. You should have a licensed copy of Windows XP.
2. Read your warranty document carefully or consult the customer care to make sure that warranty remains valid when you install a second OS on your computer.
3. You’ll need to create a separate partition (or overwrite an existing one) for installing XP . Make sure there’s enough space on the hard drive.
Now head over to PronetWorks and HowToGeek for a detailed guide on installing Windows XP on your pre-installed Vista laptop. It’s a bit geeky method but nicely illustrated at both the places.
Related: Download Windows Vista Wallpapers

use microsoft virtual pc 2007. you can download them for free at microsoft.com. you can install multiple os inside main os. No need to made dual boot. its just my opinion
Most laptops come with only the C partition. Does changing this partition have any impact?
yes changing the c partiton has effect.bettter to use microsoft virtual pc 2007
Most laptops come with only the C partition. Does changing this partition have any impact?
No just us partition magic it will fix every thing.
Dual boot is better then Microsoft virtual pc 2007.
must user want to go back to xp because of bug in vista (for example java programmer) or speed.
i been us partition magic on computer to install more then one os like one of my pc have xp sp3, 2000 sp4, 98se and linux all on it.