Visit OnguardOnline.gov to avoid to be infected with fake antivirus o rogue software.The warnings look real, mimicking Microsoft or well known AntiVirus products. The names sound legitimate.
Avoid FBI, IRS and other scams
In most cases, you'll confront scammers who want to scare you into buying "rogue" security software by making you think your computer is infected. ("Rogue" means software of unknown or questionable origin, or doubtful value.)
What to Look For Rogue Spyware
Rogue anti-virus/spyware programs often generate more "alerts" than the software made by reputable companies.
You may be bombarded with pop-ups, even when you're not online.
High-pressure sales copy will try to convince you to buy RIGHT NOW!
If you've been infected, your computer may dramatically slow down.
Other signs of infection include: new desktop icons; new wallpaper, or having your default homepage redirected to another site
What does rogue security software do?
Rogue security software might report a virus, even though your computer is actually clean. The software might also fail to report viruses when your computer is infected. Inversely, sometimes, when you download rogue security software, it will install a virus or other malicious software on your computer so that the software has something to detect.
Some rogue security software might also:
Lure you into a fraudulent transaction (for example, upgrading to a non-existent paid version of a program).
Use social engineering to steal your personal information.
Install malware that can go undetected as it steals your data.
Launch pop-up windows with false or misleading alerts.
Slow your computer or corrupt files.
Disable Windows updates or disable updates to legitimate antivirus software.
Prevent you from visiting antivirus vendor websites