Just and FYI and something to try: I do have a separate account that I call ADMIN. It could be any name, but just needs to have admin privileges. It is an account originally used to get my PC going before I created my own personal account where I do all my work. The ADMIN account, for me, is there in case something happens on my personal account, and I need a good account, I can still get into the system. You could try to create another account, and give it admin privileges, and call it ADMIN or any other name (it is just a name). Once done, you can switch user to that account, and with the installation executable located in C:\ , try installing from that new account. At the install, you can tell TurboTax where to install itself. Mine is installed in "C:\Program Files (x86)\Turbo Tax\Home & Business 2022\". Once installed, move back to your "user/personal" account. At that point, you may have to go find the "TurboTax" executable, which was just installed, and put a shortcut \ ICON on your user account desktop. It should be in the directory you told TurboTax to install in. While my admin account already existed, it is quite possible adding this other account now, could still solve your problem.
Further note: Last year when I had my problem, I tried my download, a new download directly from TurboTax and a CD. None of these would install. Until I switched to my other account, which also had admin privileges. It then installed fine. I did not try other downloads this year. When it failed again this year with the same symptoms, I just put my installation download on the common C:\ drive, switched user to the other account, double clicked the installation download, which then installed fine. I then switched back to my user account and all was good! Both of these accounts, what I call ADMIN and my personal account, have admin privileges.
