More on Intel anti-cheat technology revealed
 

The concept is simple, the chipset records all input from the keyboard and mouse, and the game does the same. If the two don't match, something is giving inputs to the game that should not be, and you are 'cheating'. This is how most of the common hacks out there work.

As was said earlier, this could catch game cheats as well as click fraud, but could also help notify users of spyware and trojans. In general, if something emulates input, this should flag it.

http://www.theinquirer.net/default.aspx?article=40535