network wireless through modem and printer through blutooth : I think, it's block.

I use Window 7 basic original. First please tell me that I had used the Microsoft security essential, but I get ad wares and malicious in my pc. So, I want to replace and add  the antivirus for my pc, Quick Heal antivirus. I am confuse, what can I do, for all solutions.

                vksaxena   kumar472@hotmail.com