Windows OS and Antivirus?

i build pc systems in my spare time and sell them on. i want to installl windows xp and windows vista depending on requirements.

my question to you lot out there is can i use the same operating system disc to install on another machine,

or

do i have to buy another windows OS to install on each machine?

and also what free antivirus software would you recommend?

Windows OS and Antivirus?computer repair

you have to buy another Disk , u cant use the same CD 2 install the OS in other comp. theres only one way to purchase new activation codes from Microsoft they'll only gave you activation codes for 4 computers.

u can install the OS to your other pc but it wont work after 30 days.. because you cant use the same activation code for both computers. contact Microsoft I suggest you to call them.

If you have AT%26T use their software internet protection is good better then Norton or any other out there and its free ... but only works with XP at the moment~!

Windows OS and Antivirus?free antivirus

I think microsoft expect you to license (buy a copy) of their so called operating system for each each PC. Why not use linux, that way you will not need licenses (or anti virus)
Unless you have an OEM license agreement, you have to buy each time or the owner will run into registration problems and you don't need that kind of feedback. I highly recommend AVG free or Avast if for an individual. If they are for a business, look into the PC-cillin for good products scalable to the users needs and great support at a very reasonable price.
Hi,