Denuvo64.dll is a Dynamic Link Library (DLL) file associated with Denuvo, a digital rights management (DRM) software used to protect games and other software from piracy and unauthorized use. The "64" in the filename indicates that it's a 64-bit version of the DLL, designed for 64-bit Windows operating systems.
When denuvo64.dll is missing, corrupted, or blocked, games may fail to launch, resulting in errors such as: denuvo64dll