Efsadu.dll is a process belonging to the Windows program. The main function of efsadu.dll is to provide support for file encryption in the EFS or Encrypting File System. Efsadu.dll error messages may come out once your PC boots up or shuts down or when you tempt to run a program and it can not find its required dll file. This efsadu.dll errors are caused by missing or corrupting the file of efsadu.dll.

Common efsadu.dll error messages:
- "Efsadu.dll Not Found"
- "This application failed to start because efsadu.dll was not found. Re-installing the application may fix this problem."
- "Cannot find [PATH]\efsadu.dll"
- "The file efsadu.dll is missing."
- "Cannot start [APPLICATION]. A required component is missing: efsadu.dll. Please install [APPLICATION] again."

How to install efsadu.dll file?

1. Press Start and select Run
2. Type CMD and press Enter (or if you use Windows ME, type COMMAND)
3. Type regsvr32 efsadu.dll and press Enter
4. In the end, you should receive a message saying that your file was successfully installed or uninstalled.