did he say warez, no he didn't now theres a few reasons why he might be upgrading without paying, gift, had it already on another PC, got it via uni when he signed up for a course, so to all those who posted above STFU.
Piracy is not a joke anymore. There used to be a time when you could get away with it. But almost every prog you get now has to be activated or calls home giving info as far as whether it is legally owned or not. And don't think a firewall will stop this, they know other ways around it. Like for instance they send it through things like svhost (remote procedure call) and such.
Back to the question ... yes you can. I actually asked the same question some time ago. It went fine. A few days later, I got multiple errors, until I couldn't boot anymore. I ended up with a fresh install.
Ep, glad to see you come back and tidy up...did want to ask a one day favor, I want to enhance my resume , was hoping you could make me administrator for a day, if so, take me right off since I won't be here to do anything, and don't know the slightest about the board, but it would be nice putting "served administrator osnn", if can do, THANKS