I ran into this today and found that Intuit’s support on the matter was the most abhorrent. The solution that I found was to turn off the AOL Tech Fortress. Disable that and run the install again.
I ran the installer from the folder underneath the main folder on the drive. So, I went into the Turbo Tax folder and ran the installer from there.
Initially I started with just running the default installer for Turbo Tax. That gave me the “error deleting run registry key for deletion” new install on windows 10. I then went into the folder mentioned above and then ran the installer directly. That failed with the error 65535 Windows installer error. I noticed an app specific 3rd party notification pop up (not part of hte normal windows 10 notifications) that then disappeared in a matter of seconds. I noticed something called appguard. I went looking for that and found it was the AOL Tech Fortress. I found a way to turn it off and tried the install again.
I have no idea where the AOL Tech Fortress program comes from. Looking at the history shows that it had been interfering with every attempt to install Turbo Tax.
This is something that Intuit should already know about and it is disappointing that their tech support doesn’t have it. Their whole system seems to be set up to minimize exposure of bugs/issues with their program which due to that leaves you in the dark about the solutions that might be possible. Their whole system is just bonkers.