On a laptop in Chrome, every time the user typed something into Google, it would come up with suggestions, the software identified itself as AutoComplete Pro which the user never installed. Looked in installed programs, nothing. Looked in Task Manager, nothing. Looked in the extensions of Chrome, nothing.
The one thing that was different about Chrome is when you went to the preferences page, there was an extra “Google” entry in the Manage Search Engines… button menu. Disabling this meant that it no longer appeared. Never seen anything like it, but since I have the platform here and most of the advice was utterly useless, I thought I would share my (temporary?) solution. It’ll hopefully get picked up by the security program guys soon so it can be cleaned out properly. What a nasty piece of malware AutoComplete Pro is.