[purenuman]

CWS is a robust infection that exhibits robust intelligence, technical prowess and a determination to survive removal attempts. CWS wants to live.

The difficulty of removing CWS from a user's system is significant. In the early variants, CWS was slightly tricky to remove, but it could be done, carefully, by a knowledgeable Windows user.

However, CWS has stepped up the battle and recent variants are virtually impossible to remove manually. Some CWS variants even use methods of hiding and running themselves that had never been used before in any other spyware strains.

The chronological order in which the CWS variants appeared is detailed here, along with the approximate dates when they appeared online.

http://www.softpedia.com/get/Interne...Shredder.shtml