Well, it was actually caused by the settings of the scanner. It was a while ago that this happened to me, but I will try to remember it:
On the main screen for the program, click Setup in the upper right corner, then click Advanced Setup.
Then click on Real-time file system protection.
There should be a button that says "Setup..." next to ThreatSense engine parameter setup. Click it.
Under objects, make sure Runtime packers is unchecked. Then click Options and make sure that Advanced heuristics is unchecked. Then click Ok.
This advice came directly from Eset, so hopefully it works for you.
(Damn, NOD32 is definitely not a noob-friendly program :lol