For fixing Avast error occurred during installation, open the control panel then go to programs further click on “programs and features” then from the list select “ Avast free antivirus ” click uninstall then click “repair” or click on “update” button and then try to get the software removed, if still the issue continues then get the Avast uninstall utility downloaded and run it on the system as you see the tool prompting then run it in “safe mode” further click “yes” then click on the uninstall and wait for the process to complete once the procedure completes then get the system restarted.
If there is any problem that you are facing while dealing with the Avast antivirus software then, in that case, it is advisable that for an easy, instant and accurate resolution connect with the technical team and get the issues resolved.