SecureDefense is one of those rogue anti-spywares that all have been rapidly developed trying to rip PC users off. This scareware is known to be promoted by random malicious websites that spread Trojans and other malwares through fake online scanners and alerts:

Reported Insecure Browsing: Navigation blocked
Insecure Internet activity. Thread of virus attack
Due to insecure Internet browsing your PC can easily get infected with viruses, worms and trojans without your knowledge, and that can lead to system slowdown, freezes, and crashes. Also insecure Internet activity can result in revealing your personal information. To get full advanced real-time protection for PC and Internet activity, register SecureDefense. We recommend you to protect your PC now continue safe Internet Browsing.

When you click on such “scanners’, Trojans get inside the system through system security vulnerabilities found and additionally download Secure Defense. So do not get surprised to see some odd security scanners at startup. If you notice any sign of these viruses on your machine you should follow the guidelines how to remove SecureDefense given below.

When this rogue anti-spyware is on your machine, you will start getting tons of random alerts telling you about some possible cyber threats detected, for example:

Security Center Alert!
Infiltration Alert!
Your computer is being attacked by an Internet Virus. It could be a password-stealing attack, a trojan-dropper or similar.
Do you want SecureDefense to block this attack?

Spyware Alert!
Your computer is infected with spyware. It could damage your critical files or expose your private data on the Internet. Click here to register your copy of SecureDefense and remove spyware threats from your PC.

However, files, that all are actually harmless, normally are created by the same SecureDefense.

Additionally, when PC user is scared about these viruses and persuaded that his computer is at risk, he gets misleading recommendation to purchase SecureDefense. Don’t dream that you will be let use the trialware of SecureDefense for fixing your machine because only registered copy of this scam is told to be capable enough to fix the PC. However, both version of Secure Defense are known to be dangerous for the PC. Please do not become a victim of Secure Defense scam and remember that it wants only to get your money. Being a dangerous program, it should be treated with caution and removed ASAP. Don’t let SecureDefense invade your OS.