Anti-virus software, Can i re use it? (computer illiterate)?

My computer got a virus, so I took it in so that they could install Panda Anti-virus, after they installed, they gave me that cd (software) that comes with it. My question is..can I install that cd in another computer in my house, or if I buy another computer or lap top?or is it like a one time use only, Im not to computer savvy, so any other help would be great. thanks.