Hi and Welcome to B.C!
The programme is indeed malware and not legit. If you had this suddenly pop up on your screen and you purchased it, you really should never do that. If you ever see anything display itself out of nowhere and it has no relation to software stored on your computer, you can almost certainly say its a virus or spyware of some sort. Some more menacing than others.
You did right in cancelling your card.
Also, you should never use the internet without Anti-Virus AND Anti-Spyware software stored on your computer. Doing so, almost straight away will leave your system infected, especially if your downloading. Its like walking into a fire without protective clothing on, you will get burnt almost instantly.
You can click HERE
and see instructions on how to remove the malware. However, if you have used the internet without an Anti-Virus and you installed Norton after infection then there is a high chance that Norton cant see the Malware on your System.
My advice is to not connect to the internet right now for downloading. The best thing to do, to clean your system and prevent anything like this happening in the future, is to post a log in the High Jack This forum.
Please read Preparation Guide for use before posting a HighJackThis Log
Once you have done that, post a High-Jack-This log into the HJT forum section. It may take a little time in order to fix your problem, depending on the strength of infection. But, a team member there will talk you through what to do and help you fix your system.
The forum is always busy, and so are the HJT team, so please bare with them. Please allow up to 5 days for a reply. If you do not receive a reply after the 5 days, you can use the 'Have not had a reply in 5 days' log at the top of the HJT forum to let the team know.
Please DO NOT
try to bump your post by adding another reply to it first time around.
The team will look for logs that have 0 replies, if you add somthing else after your original post, then you will give yourself a reply and the HJT team will think someone is already helping you and may pass it by.This will then take more time for you to recieve any help. IMPORTANT
: Once you have posted your HJT log, do not attempt to fix anything yourself , please wait for the team to help.