Error: Virus and spyware definitions update failed


Error: Virus and spyware definitions update failed. Windows Defender couldn’t check for virus and spyware definition update. Check your Internet or network connection and try again.

Description: Your Windows Defender got corrupted.

Solution:

  • The only solution is to reinstall the Windows 8 OS.
  • The other is a workaround by running the definition file.

But the disadvantage is that every time you use it, you need to download the definition and run the installer. So download and install the latest Microsoft Security Essentials definition updates.

The Microsoft website says:

“By default, Microsoft Security Essentials is designed to install and run updates automatically. If you have disabled this feature or if you encounter problems updating automatically, you can manually download and install the latest Microsoft Security Essentials definition updates for your computer.”

Even the website having the latest virus definition and released information.

So, download: mpam-fe.exe from Malware Protection Center and run the installer.