After upgrading to Windows 10 or doing a fresh installation, users will face Windows 10 errors. Discovery users report that the product key is invalid or invalid. The most common problem is 0xC004C003. So how to solve such problems?

First we go to the settings and click on the replacement product key to try it out. The question comes, how do I get the Windows 10 product key? Click on the replacement as shown below, you can go to the Microsoft Store to buy it, but I think it is expensive, I recommend an online store to buy, a website called Vanskeys, which sells genuine and cheap product keys.

After purchasing the Windows 10 product key, we replaced it with a new one to activate it so that we can use Windows 10 normally.

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