ZeroAccess began as a delivery network for other malware onto PCs it had successfully infected. Since then, it has evolved into a “clickfraud” platform that intercepts search requests from the user’s Web browser and injects fraudulent hyperlinks into the results returned from major search sites. Now, Microsoft’s Digital Crimes Unit has recently moved with Europol, industry partners, and the FBI to take down the botnet which has taken over approximately 2 million PCs worldwide