The description says nothing about filling out a captcha but you have to be in Safe Mode to run the uninstaller. 
There is a way to get NVDA to run and speak in Safe Mode but others will have to discuss that further. 

----- Original Message -----
From: Don H
Sent: Thursday, May 11, 2017 7:37 PM
Subject: Re: [nvda] AVAST

check out this link for a free Avast removal tool

On 5/11/2017 7:24 PM, Holger Fiallo wrote:
> Can not uninstall AVAST. Went to control and prgramprogram and features
> did uninstall but did not remove it. Went to setting, app and tab to
> select AVAST tab to uninstall. Still there. Help.
> Holger Fiallo

Join to automatically receive all group messages.