important If your in the market for new anti-virus software and don’t want to pay a lot of money or are cheap like me try AVG Anti-virus from Grisoft. I”ve been using it for years and never had got a virus. Just remember to uninstall your old Anit-virus first, only one can live on your computer at a time. Get it here

From their site.
AVG Free Edition has spearheaded the company’s growth. According to Grisoft, over 40 million users have AVG Anti-Virus protection, including users of the Free Edition.

The AVG Free Edition is similar to the Anti-Virus Professional product, but does not have all the features. It lacks the fine-grained control over how scans are conducted, and it receives lower priority (than the paid-for products) when downloading updates from Grisoft’s servers. The language interface cannot be customised, and English is the only available language.

AVG features most of the common functions available in modern antivirus programs, including periodic scans, scans of sent and received emails (including adding footers to the emails indicating this), the ability to “heal” some virus-infected files, and a “virus vault” in which infected files are held

Technical Support is not available for the Free Edition, whereas support is available to users of the Professional, paid for products.