.rar then .html

Pay more attention to what you are down-loading, and the sites you are visiting.
Using a double file type is a (very) old way of fooling people into down-loading something nasty.

If you MUST visit dodgy web sites, make sure you have a good up to date anti-virus and anti-spyware package installed.

thank you

Install Avira antivirus software. It's free and has internet security. If it detects threats on a website, it will notify you.
http://www.avira.com/en/downloads/