Good and Free system security combination.
Starting from "outside" enable the rooter firewall.
Download and install
Microsoft Security Essentials with windows firewall enable.
Install in Internet Explorer the
WOT (Web of trust) add-on and disable Accept third-party Cookies.
Tools\Internet Options... (view attachment).
Install in Firefox the
WOT (Web of Trust) add-on and disable Accept third-party Cookies. Tools\options... (view attachment).
Download,install update the
Free Malwarebytes.
Download,install update the
Free SUPERAntiSpyware.
With the above steps,
A)You block almost any unwanted "connection" before it bypass the rooter.
B) Microsoft Security Essentials protect your system from virus\trojan+the windows firewall extra protection.
C) With WOT installed in Internet Explorer or Firefox you have a preopen advice which website is safe to click\enter.
D) Free Malwarebytes and free Superantispyware.
Run every few days full or quick system scans with those programs.
You can update and run scans also in safe mode if needed.
This combination gives you a good and solid protection.