During Windows installation you may see the wpcap.dll error messages appear. What's more, when you install or use some certain programs or start or shut down Windows, wpcap.dll error messages will appear. What mostly cause this error is that the removal or corruptio of the wpcap dll file. In some case, wpcap.dll indicate a virus or malware problem, a registry issue or even a hardware failure.

Common error messages of Wpcap.dll:

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

How to install wpcap.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 wpcap.dll and press Enter
4. In the end, you should receive a message saying that your file was successfully installed or uninstalled.