The incident of Avast internet security UI failed to load may leave you thinking about what to do to safeguard your PC if it’s not working. However, feature-rich antivirus software like Avast helps users to safeguard their PCs against viruses. If you are a Windows 10 user then you are probably aware of the security issues that keep on happening. 2.3 Method 3: Restart Remote Desktop Services.2.2 Method 2: Remove and Reinstall Avast.2.1 Method 1: Restart Avast Antivirus Service.2 How To Fix avast antivirus failed to load?.