Make sure you check for "Windows" updates before installing TTX. Any waiting updates will block TTX installation.
Check for any, the reboot anyhow, no matter what...and try again.
........AND Make Sure you rt-click on the installation file and "Run as administrator" Don't just double-click on it
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Beyond that
Work with Customer Support on the phone:
https://ttlc.intuit.com/community/using-turbotax/help/what-is-the-turbotax-phone-number/00/25632
____________*Answers are correct to the best of my knowledge when posted, but should not be considered to be legal or official tax advice.*
