Must upgrade my Windows ysytem from XP Home to Professional on 4 PCs in my office. What is the best legal way?

I have 4 PCs in my office and i must upgrade them to WIndows Professional in order to install another software. Three of the machines now have XP Home and the other has WIndows 2000. I would like to leaglly upgrade in the most cost effective way. Have looked for prices on internet and see a wide range. Even see Full Versions for less than Upgrades. If I buy the Full Version and install it, will I lose my existing files in the process? I also notice some vendors offer the software in retail boxes to be shipped and others send just CDs and code. What is the difference? Can’t I just buy the software as a download and skip all the shipping and CD business?

Go for legal otherwise might be sorry.

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How to get genuine windows?

Plz can any one tell me how to get genuine windows and what’s the price of it in the indian market ? fast

buying a genuine software means spending a little more money than what you could in india ,
be its very easy , all the laptops with operating systems have the original genuine copies but that goes on to say that only the good laptops have original softwares installed and you get a back up cd for that as well.
for example you can go in for DELL , or VAIO , or COMPAQ
all would have a genuine operating system ,
originally the price of XP in india was near 20,000 . so the smart thing is to get a laptop which includes this cost .

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Can I install windows vista operating system on a new pc with linux?

I cant afford a full price pc but would like a more upgradable model. Tescos have some wich have the Linux operating system starting from £139.99 my mom has windows xp operating system at home can I just go ahead and install it should I decide that I will by one of these PC’s. Or is linux a good operating system?

Linux is a far better OS than Windows but takes a lot of getting used to try it after a while you will love it

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