Do you have the latest Windows 8.1 updates, or is Windows Update active?

If you are running Windows 8.1 or Windows RT 8.1 and automatically get updates, you do not need to do anything. Windows Update will download and install the update. To ensure your device is up to date, navigate to Start > Settings > Update & Security > Windows Update and see your update status and available updates.

Check if your operating system supports Azure code signing

If your operating system supports Azure code signing, use the latest product version to prevent other issues:

I have ESET Endpoint Antivirus:

I have ESET Endpoint Security:

If your operating system does not support Azure code signing, you must install version 9.1.

I have ESET Endpoint Antivirus:

I have ESET Endpoint Security:

For more information, refer to the Install or upgrade ESET Endpoint Security or ESET Endpoint Antivirus on a client workstation Knowledgebase article.