Select Avast from the list of installed apps.Go to Programs and select Programs and Features.Once installed, reboot the computer and check if the error occurs again.If there is an update pending, click on the available option to download and install the update.From the Settings menu, open the General tab.Launch Avast antivirus and click the menu icon.In some instances, you may also want to install an older version of the software until the bugs in the latest version are fixed. Reinstalling Avast may not be an ideal solution, but you probably have to do it anyway if the built-in repair function fails to repair the software. Once uninstalled, download the newer version of Avast from the official website and proceed with the installation.Click on the Uninstall button on the setup screen.Type appwiz.cpl and click OK to open Control Panel.What can I do if Avast virus definition update failed? 1.

If you are also troubled by this error, here are a few troubleshooting steps to help you resolve the Avast Antivirus not updating problem on your Windows 10 PC.

This error can occur due to several reasons including corrupted installation files, a glitch in the antivirus solution or even some Windows issues.

Virus definitions are not up to date – release date was invalid date However, several users reported the Virus definitions are not up to date error. Home › Antivirus › Avast not updating virus definitionsĪvast is a popular antivirus solution and to keep the latest malware and adware out of your system, the virus definition updates automatically.

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