Live Security Platinum is the latest malware client in a long list of rogues. This is not a real security product. There is a good virus removal website that has a video on how to remove this threat. www.removevirus.org/live-security-platinum guide will help.
Malware clients like this are very common online. There are many different ways for a PC to get this virus installed. One way if from the end user being tricked into install the program.
This can be a very stubern malware virus to remove. You big focus should be on stopping the program from running. Once this is done you will have a much easier time getting rid of the rest of the virus.
One client we like is malwarebytes. The free version is not the best for protection but it's great at removing viruses.