Error 70001

I have downloaded and reinstalled Turbo Tax 2024 many times, and have tried everything the support people told me to. First I get a message that suggests restarting my computer. After three restarts with no effect I clicked Restart Later. Then I get Error 70001 "Turbo Tax is already running under another account. Switch users and run Turbo Tax from the other account to continue." My computer is running Windows 11 fully updated. I do not have another account. I've spent hours on the phone with tech support. Does anyone know what could be causing this?

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