winfixer??????

Is winfixer a virus? it sais it is a virus protector but whenever i go on the internet it popsup for me to download it!!!! it bugs me and my faimly!!!!!!!!!!!!!

My computer is slow. My virtual memory always says its slow. I have a virus protector that i quarintine the bad stuff ever once and a while. I want to set it back to factory settings. Will that delete unneccessary stuff? and make it faster? Can i do this w/o deleting some program like word? and powerpoint? if not are there any tricks to making it faster!?