1
Use "anti-virus software" and keep it up to date.

2
Don't open emails or attachments from unknown sources. Be suspicious of any unexpected email attachments even if it appears to be from someone you know.
 

3
Protect your computer from Internet intruders – use "firewalls."
 

4
Regularly download security updates and “patches” for operating systems and other software.
 

5
Use hard-to-guess passwords. Mix upper case, lower case, numbers, or other characters not easy to find in a dictionary, and make sure they are at least eight characters long.
 

6
Back-up your computer data on disks or CDs regularly.
 

7
Don't share access to your computers with strangers. Learn about file sharing risks.
 

8
Disconnect from the Internet when not in use.
 

9
Check your security on a regular basis. When you change your clocks for daylight-savings time, reevaluate your computer security.
 

10
Make sure your family members and/or your employees know what to do if your computer becomes infected.