Installation STALLING OUT at 9% AGAIN! Requesting Help, please

[GrannyT]

Despite best efforts and use of support topics and advice, the downloaded 2020 turbo tax premier WILL NOT INSTALL! It repeatedly gets STUCK at 9%! I turned off anti-virus security and that didn’t help. What to do, please? 
Thank you so much!

[KatrinaLO]

If you are having issues and need assistance, please contact customer support. Please see the Customer Support phone number here. If you would like to reach out through our website, please see the TurboTax FAQ below for contact information: https://support.turbotax.intuit.com/contact/

[bhoovu]

Same problem here.  Stalling at 9%.

[bhoovu]

Turned off Domain firewall in Windows Defender.  Restarted and tried install again and everything worked.  Turned firewall back on.  Good luck

[msmerwan]

I turned off my Windows Firewall and my Bitdefender Antivirus firewall, then ran the downloaded .exe file for my 2020 Business and it worked right away.  Previously was stuck at the 9% even after turning off the Bitdefender firewall only.

[william4602f]

Turning off firewalls/adding exceptions didn't work for me, but following procedures here did:

https://ttlc.intuit.com/community/bugs-and-error-messages/help/error-1719-windows-installer-service-...

File checker seemed to be the step that worked; no idea why since it didn't find an errors.