There isn't any one antivirus protection (free or paid subscription) that will catch everything. You must be careful yourself what links you open in order to have good protection. You didn't indicate what operating system you're using so this will be general information. Whatever Microsoft protection was included with your Windows OS is good to use. Besides that protection, I use PCUNIFI (at .com / free version), and Pcunifi ( free version ). These three coupled with being careful of links opened should serve you well. If you're in doubt about any link, leave it closed so you can search the link to see if it's safe.

Vist this Source:

Online Scan for Virus
Free online Scan for Virus