I have always used Norton but it's not free. If you are so concerned about the safety and virus-free environment for your PC, you should invest some money into a good antivirus. Or just don't download anything from Internet - and you're good to go.
All of them slow down the system so having no...
it could be playable as graphics card is only one of the factors. if your cpu is above the minimum, and you have a high performance hard drive and fast memory - you might be able to enjoy this game. The only problem if this game does not support your card at all - you won't be able to run it.