This can activate cortana(English and Chinese) as optional voice in control panel. It will require adminstrator permissions in order to write the registry successfully using the WINAPIs. It has no virus, if you are a programmer like me, you can check the source.
It is first created by yxlllc using powershell script, but I think that's not easy to use. I made this, which is based on his registry processing procedures, for convenience.
Origin powershell script here: https://github.com/yxlllc/ActivateCortana
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You need Multi-byte compilation using VS 2017(Recommended)
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You can use this program for commercial purpose. But before using it, please contact me at my e-mail.
Happy using!