If you must use Windows, the following is what I consider the minimum required for safety;
1. Install and use Firefox instead of Internet Explorer.
http://www.mozilla.c...os=win&lang=en-US
2. install both of the following add-ons to Firefox
Adblock Plus-
https://addons.mozil...irefox/addon/1865
Noscript-
https://addons.mozil...firefox/addon/722
3. install Zone Alarm
http://www.zonealarm...larm-firewall.htm
(use the "Download Basic Firewall" download link
4. install AVG free anti-virus
http://free.avg.com/download?prd=afe
(scroll down and use the "AVG Free 8.5 for Windows" link to install
5. Use web-based email - Hotmail etc. Never, ever, ever use Outlook.
There are more options but the above is, as I said, the minimum.