Windows Activation Issue Months After Downgrade to Windows 10

M

Muhamad Eginda Erlangga

Hi everyone,I have an HP 14s laptop, and last year, I upgraded the hard drive to an SSD and changed the battery at a computer repair shop. My laptop originally came with Windows 10 Home Single Language, which I later upgraded to Windows 11. When I took my laptop to the repair shop, I asked the technician to downgrade it back to Windows 10 for better performance. However, they installed Windows 10 Pro instead of Windows 10 Home Single Language.Now, I’m getting an error saying I need to activate Windows. I found my OEM key using ShowKeyPlus, but when I try to use it to activate Windows, it says

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