Purchased & downloaded TBT from Amazon. It worked fine for a week - I had no problem getting the initial Fed Update at the start of each session. But then suddenly got "A fatal error occurred during installation. Microsoft Installer Error 1603." As suggested, I downloaded the Perrel SuperPatch file and confirmed the "Product SuperPatch has been successfully applied." But after numerous tries, I still get that original "fatal error" message, and could not access the return to work on it further.
I understand I may next need to uninstall the TBT file that I've been working on, and then re-download a new copy of the TBT Deluxe. But in doing so, even if that second copy would indeed work, would I have to lose all the work I have put into return earlier?!
Same issues. I uninstalled TT2021,and downloaded a second time with the firewall off. Opened as ADMIN for the reinstall and everything worked fine. Don't forget to turn the firewall back on after the reinstall and first update. Hope that helps.
Please see the below TurboTax help article for troubleshooting steps related to Error 1603.
Error 1603: "A fatal error occurred during installation or updating"
If you continue to have issues please see the link below to contact one of our TurboTax representatives:
@swjutting wrote:
No link to article in your answer
TurboTax support FAQ for error 1603 - https://ttlc.intuit.com/community/bugs-and-error-messages/help/error-1603-a-fatal-error-occurred-during-installation-or-updating/00/26193
locked out of my return, was done ready to e-file asked to put updates thats when there was an error message. Cannot return to my work.
If you are receiving a error 1603, please see the TurboTax FAQ below, for instructions on how to correct this error:
Error 1603: "A fatal error occurred during installation or updating"