If you have re-started and your Windows OS is up to date, then the TurboTax installation should start. If the installation file will not start because of the same message, then delete the file and re-install the installation file.
If this continues to be a problem then contact TurboTax support.
Use this website to contact TurboTax support during business hours - https://support.turbotax.intuit.com/contact/
Support can also be reached by messaging them on these pages https://www.facebook.com/turbotax/ and https://twitter.com/TeamTurboTax
