Follow theseComputer Safety Tipsto prevent unintended installations of rogue scanners and other forms of malware.
Before installing any new program, search the Web and read reviews to see what others have experienced.
If you don't have an antivirus on your computer, you need to install one ASAP. Make sure you only have ONE antivirus program on your computer or it may slow your computer down to a crawl. If you don't have one, Microsoft now has a free one.