I'm amending my returns. Turbotax is asking me to update. "Failed to install update. Microsoft Installer error: 1603, Fatal error during installation."

[RedCab]

I've disabled my virus checking and firewall. Still getting error. Turbotax won't let me proceed without the update.
What can I do?

[Critter-3]

https://ttlc.intuit.com/turbotax-support/en-us/help-article/product-delivery/error-1603-fatal-error-...