See this TurboTax support FAQ for a solution on the error for a Win 10 installation - https://ttlc.intuit.com/questions/3206405-error-1719-windows-installer-service-could-not-be-accessed
If the solution does not work for your install then you will need to contact TurboTax support and speak directly with a support agent for this error.
See this TurboTax support FAQ for a contact link and hours of operation - https://ttlc.intuit.com/questions/1899263-what-is-the-turbotax-phone-number
To contact TurboTax customer service/support use their contact website during business hours.
Submit your question/problem during business hours and then use the option for Call (a phone number will be provided for Call) to speak directly with a TurboTax agent -
https://support.turbotax.intuit.com/contact/
Note: The Call option will not be available when TurboTax Support is closed.
