Anki cannot be opened and installed

I am in the process of using anki, it suddenly stuck, I choose to exit the program, and then click into it, it prompts me to have updates, I click on the official website to download, gt6 and gt5 can be downloaded normally, but it can not be installed, showing an error.
I click into anki again, showing: anki. exe - system error
because can not find python39. dll, can not continue to execute the code.Reinstall the program may solve this problem.
I tried many times, is this kind of situation.
I would like to ask what is going on, I can neither install new, also can not enter anki.
Thank you for your answer.

Startup Issues - Anki Manual

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