Applies to Sophos Home running on Windows 7

What is happening

The message "Windows requires a digitally signed driver" may appear when installing Sophos Home on Windows 7. This happens when the Operating System is missing security updates that allow Windows 7 to use SHA-2 code signing.
Technical details: https://docs.microsoft.com/en-us/security-updates/SecurityAdvisories/2015/3033929 

How to  fix it

To address this issue you need to update Windows 7 with its latest security updates. 

Click on the Start menu button
Click All Programs
Click Windows Update
Select Check for updates
Click Install Updates

For additional assistance updating your Operating System, please refer to Microsoft support