If the file appeared unexpectedly, run a scan with Windows Defender or Malwarebytes to ensure it isn't a backdoor.
Because "közös feladat" is a common term used in Hungarian IT education (specifically in programming classes or university labs), this DLL is frequently found in repositories or projects related to: kozos_feladat.dll
If you found this in a programming folder you created or downloaded for a class, it is likely a legitimate part of your code . If the file appeared unexpectedly, run a scan
Since it is not a "known" file from a major vendor like Microsoft or Adobe, its safety depends entirely on its source: If you are a developer, ensure the project
Ensure the application has a correct reference path to the location of the DLL.
If you are a developer, ensure the project containing the shared library is built correctly in Visual Studio.