Trojan.Ransomlock is a detection for Trojan horse programs that lock the desktop of a compromised computer making it unusable.

Initial Daily Certified version of virus definitions for Norton security products was released on April 15, 2009 revision 016. It should be noted that users with the older versions of Norton Internet Security are limited to Daily LiveUpdate definitions. For more information, go to the page where the are described virus definitions available for Norton products.

Trojan.Ransomlock Threat Assessment

Component	Severity
Wild Level	Medium
Number of Infections	50 - 999
Number of Sites	3 - 9
Geographical Distribution	Medium
Threat Containment	Moderate
Removal	Moderate
Damage Level	Medium
Distribution Level	Low

According to the Symantec Threat Severity Assessment, overall risk of Trojan.Ransomlock is now categorized as «Very Low» — poses little threat to users; rarely even makes headlines; no reports in the wild. Read more about Threat Severity Assessment.

More information about Trojan.Ransomlock, you can find on the official site of Symantec Corporation, where in addition to useful information you can find technical details and removal instructions: www.symantec.com

It is also recommended to read the article Network security threats, where you can find a brief description and explanation of the most dangerous security threats plus a few simple tips on how to protect your personal computer from them.