Errors of the type Advrcntr2.dll, most commonly the error "This program requires the file advrcntr2.dll, which was not found on this system.", are caused when the advrcntr2.dll file is deleted or moved from its correct location.
How to Fix AdvrCntr2 DLL Error
If the error applies to Nero, follow these steps to resolve it.
Restart your computer. The advrcntr2.dll error could be a fluke and a simple restart could fix it completely.
Note the serial number of your specific Nero installation. An easy way to do this is with a product key finder program.