Another great browser to try:
Forefox. At least as fast as Chrome, often faster.
On both Chrome, Firefox or Internet Explorer, install the Adblock plus addon. It's realy great at sanitizing the web.
You may also take a look at the NoScript addon. It allow you to controll exactly whitch scripts are allowed to run and from what sites. White and black list based.
You don't need the paid version of Malwarebyte. The free version have everything you need.
Some other very good anti-virus:
AVG from free.avg.com
Avast (take the free version, NOT the free trial version)
Avira (take the free version, NOT the free trial version)
Electro, January 2015