Cannot Activate Windows 10 Pro from Windows 10 Home installation

[Vincent Incarvite]

I had Windows 10 Home installed in my old computer. I moved the hard drive to my new computer and learned that it was only valid once per motherboard. I bought a Windows 10 Pro key online and tried to activate it. It didn't work, so I went through the activation troubleshooting. Still didn't work, so clicked "Get Help" on the Activation page. I followed all of the steps from the robot, but it didn't work. I clicked to sign in, but when I clicked "Call me back" to speak to a person, I got a spinner then this error:

An error occurred​

Please try your request again later​

CV: QUHEysL8dEa7OmXudEaPDQ.0.53​

Also, for your reference, when I tried to change the product key via the Activation page, I got this error:

The product key you entered didn't work. Check the product key and try again, or enter a different one. (0xc004f050)​

Summary / Specifics:

- The key I'm trying is for Windows 10 Pro.

- Troubleshooting doesn't work.

- I get an error (above) when trying to change the key.

- I get an error (above) when trying to contact a human at Microsoft.

- System Information:

OS Name Microsoft Windows 10 Home​

Version 10.0.19041 Build 19041​

Other OS Description Not Available​

OS Manufacturer Microsoft Corporation​

System Name [REDACTED]​

System Manufacturer Micro-Star International Co., Ltd.​

System Model MS-7B17​

System Type x64-based PC​

System SKU Default string​

Processor Intel(R) Core(TM) i7-9700K CPU @ 3.60GHz, 3600 Mhz, 8 Core(s), 8 Logical Processor(s)​

BIOS Version/Date American Megatrends Inc. A.A0, 8/14/2020​

SMBIOS Version 2.8​

Embedded Controller Version 255.255​

BIOS Mode Legacy​

BaseBoard Manufacturer Micro-Star International Co., Ltd.​

BaseBoard Product MPG Z390 GAMING EDGE AC (MS-7B17)​

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