Error code: 0xC0070643

Hello Rob,

We are sorry to know that you are getting 0xC0070643 error for the AVG program installation.
We really appreciate your efforts in trying the troubleshooting methods in fixing this issue.
In this case, we request you to get connected to our additional support.
We have sent you the email instructions to get our additional support.
Please check for the email on spam or junk folders if it is not present in the inbox.

@ Jeanne Kugler Ping
Jeanne, Please refrain from carrying out multiple postings on basically the same subject! You won't obtain an answer to your query any faster!. 
AVG Guru

https://support.avg.com/answers?id=906b00000008thXAAQ

I
have the same problem as all in the above thread link.

I have removed, retried, rebooted again and again. 

Windows 10.  Removed McAfee completely.  No joy!!!

CAN YOU PLEASE PUT THE FIX ON YOUR WEBSITE

@ Jeanne Kugler Ping
Jeanne, Please refrain from carrying out multiple postings on basically the same subject! You won't obtain an answer to your query any faster!. 
AVG Guru

I need the email instructions for more support also thank you

Hello Jeanne,
You can find answer to your question together with your another post here https://support.avg.com/answers?id=906b0000000XcY2 .Please try to keep whole conversation in one question/thread to speed up resolution. Thank you.

Hello Rob,

We are sorry to know that you are getting 0xC0070643 error for the AVG program installation.
We really appreciate your efforts in trying the troubleshooting methods in fixing this issue.
In this case, we request you to get connected to our additional support.
We have sent you the email instructions to get our additional support.
Please check for the email on spam or junk folders if it is not present in the inbox.