Possible Causes for Avast UI failed to load on Windows 7/8/10 However, though you may click on restarting service with the hope to get this problem fixed, the chance of success is little. You will also see the apology from Avast and two options to choose from namely: Exist, Restarting Service. Rather, you will be shown a message saying that Avast UI failed to load which means that the Avast UI process is currently not loading. When you click on the Avast software to open it, you will find avast service not running anymore. When there are some issues with your Avast software, it will stop to open. Let’s begin: What is Avast UI Failed to Load Issue? We are going to let you know the possible causes behind this AV service not responding error with a helpful guide to solve AV service on your Windows PC. No matter whether you have Windows 7,8 or 10 version, the solutions we are going to discuss how to fix AV service not responding on Windows will work effectively on all the versions. However, if you are a user of Avast, have you ever faced an error message such as ‘UI failed to load’ with AV service not responding issue? If this is the problem you are facing and want to know how to solve this issue, you have come to the right page. It helps to safeguard the computer and the system from harmful viruses. Avast is a widely used third-party antivirus program nowadays.