pernicious rootkit in Help, my PC is infected! Posted March 29, 2012 · Report reply If it came from CNet's Download.com, then that explains it. They use a download wrapper that installs some junk on your computer (which is why many consider it a trojan), and then that download wrapper will download the file that you had originally wanted. Technically, the download wrapper from CNet isn't malicious, however it does install some components that could be considered spyware. You may want to check the extensions in your web browsers to make sure that it didn't install any extra toolbars or browser addons/extensions/etc.