Certain precautions can be taken to reduce the risk of a virus infecting your computer. Precaution #1: Use the default security settings in Microsoft Office. Precaution #2: Turn on the security features in the Microsoft Windows Security Center, and keep your computer updated.  You can visit the Protect Your PC site, which guides you on how to use the Windows Security Center to enable the internet firewall, antispyware software, and antivirus software. You should also always allow the Microsoft automatic updates. Precaution #3: Try a subscription to Windows Live OneCare. Precaution #4: Find out whether you really have a virus. Precaution #5: Check the Microsoft Security Bulletins regularly. Precaution#6: Download files only from trusted sites. Precaution #7: Install only from authentic CDs. Precaution #8: Back up your data regularly. Precaution #9: Don’t open suspicious e-mail messages or files. Precaution #10: Be sure do a full back up of your system on a regular basis. Precaution #11: Always use an anti-virus software program, one with both an on-demand and an on-access scanner. Precaution #12: Don’t allow your web browser to automatically run programs. Precaution #13: Configure your web browsers to disable ActiveX, Java, and Javascript. Precaution #14: Using an updated anti-virus program, scan all new software for viruses before installing them on your hard drive. Precaution #15: Know that the only way a virus spreads is either by launching an infected file or by booting an infected disk.

Youtube video:

http://www.youtube.com/watch?v=CiIToBYDtqA

Sources:

http://office.microsoft.com/en-us/help/best-practices-for-protection-from-viruses-HA001103069.aspx

http://www.allaboutcookies.org/security/

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