Can I buy one CD and install windows vista on 2 computers?

I have two computers that I want to upgrade to Windows Vista. Do I have to buy two copies of Windows Vista (one for each computer), or can i buy one copy and install it on more than one of my home computers? what is the most number of computers can i install with one cd?

Can I buy one CD and install windows vista on 2 computers?kawasaki

noto answer your question. one serial no. per computer and windows vista comes on dvd

Can I buy one CD and install windows vista on 2 computers?nortan antivirus

Read the EULA, the long legal document that pops up when you install. Odds are that Microsoft will own your soul if you try it, but if you don't register on the second installation and don't ask for technical support you may get away with it. Or at least that works for most other software...
Surely u can buy one Vista Cd and upgrade them to several PCs. But dont make copy of Vista as it will be piracy. Upgrade vista to more than 1 but by original cd of VISTA.
The answer is NO!!!!!! each computer needs to have its own CD key. if you use the same key for multiple computers when you activate the OS with microsoft they will see you have it on more than 1 computer. you may sneak by for a while but if they catch you the fine is 10,000.00 and they get to pull all versions of Vista from your house. that is because you violated the user agreement. when companies install multiple copies of software they buy permission to have that right. but they pay per block of CDkeys. You will be playing with fire for trying it, but then again plenty of people do it all the time without getting caught. it's up to you if you want to take the chance.I only know 1 person you got caught, but he was 15 so they could not fine him for it.