From my experience Nod32 is not that much problematic. After performed a normal uninstall, you can perform a manual clean-up as described here. But it required registry tweaking and is suitable for advanced users only.
However, if you have any problems when uninstalling or installing Nod32 product here is a free tool from Nod32 Netherlands., just download Nod32 Removal tool(176Kb, v.126.96.36.199) and run the program, select ‘yes’ to finish the job. Note that the program interface language is Dutch. [via]