my computer keeps freezing up & running slow and my default security software says i need virus protection, but it only offers ones with costs. any suggestions?

When I log onto my PC I have to reactivate my Webroot anti-virus protection manually. It does not come on automatically on it’s own. I want it to come on automatically. I feel like my computer is not fully protected because of this. Any advice and suggestions as to how I may resolve this issue would be greatly appreciated. Thanks.

I recently bought a virus protection program for my computer. I am about to buy my son a new computer, (both dell’s) can I use my virus software on both computers without having to pay for it twice? (pay another annual fee). Or does it go by individual computers?
I bought a new dell and it came with a free 30 or 60 trial of their virus protection, I bought the program after the trial time. The other new computer is coming next week. I really don’t think I should have to pay for this twice.

Whenever I try to run a scan using Earthlink Protection Control Center, it will start to scan but stops right away. I assume this is because a virus is stopping it from scanning. Can I fix this, or is my computer gone for good?

I would like to purchase a virus protection for my computer. what is the best one out there? i know there’s free virus protection online that i can download but i think you can get popups and things like that from it.