When in doubt...don't. I use the latest version of Firefox w/ NoScript, AVG anti-virus, and Malwarebytes anti-malware.
The AVG provide real time protection and will tell you if sites that come up in a search are safe. Also a couple of times it has warned me of threats after clicking on blind links that are sometimes posted in forums or on facebook. It then gives the option of going ahead or getting out safe.
The NoScript will keep sites from running malicious scripts if you do happen to visit a site with malware.
Malwarebytes will scan your machine for malware and will quarantine any if any is found.
All these programs are freeware and perform as well and probably better than anything your computer came bundled with.
Never download "free music" software and if you use P2P always scan rar's and zip's before opening.
Good luck and stay safe