Michael,
Did you find out what was wrong with your computer? I followed instructions for checking functionality of Microsoft Windows Installer/Uninstaller program. No issues found.
Could this TurboTax error be due to more than 5 installations of the CD? Once this error is generated, it apparently stays with your computer for any other TT installations. Intuit emailed me a softcopy of the 2020 Premier TT with a new license code. Same error repeats. To see if the problem was only with 2020 year TT, I tried to open my 2019 TT. It failed to open with the same error. Then, I installed my 2021 TT Premier last night. It failed to launch with the same error. So, another question is: if a user has more than 5 installations of a TT CD, what does TT software do? In my case, during last 8 weeks, several TT customer support employees had me to uninstall and reinstall my CD and also the soft-copies they emailed me.
