Legitimate DLLs are digitally signed by trusted publishers like Microsoft, Adobe, or NVIDIA. They are stored in system folders ( C:\Windows\System32 or SysWOW64 ) or within a program’s installation directory.

sfc /scannow

Run a full offline scan with Windows Defender (or Malwarebytes, Kaspersky Virus Removal Tool). Pay attention to detections in:

A: If you no longer need the software that uses keygen32.dll, you can uninstall it to remove the DLL file. Alternatively, you can use a DLL removal tool or consult with a system administrator for assistance.