Windows 10: Activation Error after 2 years

I've got a problem with my windows license key. I don't have one because i bought my pc few years ago so i probably throwed it away. Now after around 2.5 years my pc shows me a communicate "Your windows is not activated, go to settings..." but i can't do anything without a license key. Can you help me in some way please?

:)

 

Windows 10 will not activate Error code 0x803F7001


Possibly there can be the problem with Microsoft activation Server, so your Windows 10 is not activated. In this scenario, you need to wait and verify if it is the issue from Microsoft’s side. But if you are getting error code 0x803f7001, you can also try these steps:

1. Open Settings app. Then go to Update and security > Activation screen > Change product.
2. Type your Windows edition product key and click Next.
3. You’ll get We couldn’t activate Windows error message.
4. Retry steps 1-3 then type your 25-characters unique product key.
5. Wait for the process to complete, Windows 10 is activated.

Hope something helps this problem

 

Windows Activation Error Code 0xc004f050

Hi.

My name is Edward M.

I hope to help.-

Before performing these steps, check the date and time of your computer sometimes the downloads produce errors due to the configuration of the system, and once updated or purchased the update of the date, time and time zone where you are, try these steps to
solve activation errors:

1. Confirm that the device is up to date and running Windows 10, version 1607 or later. Learn to update Windows 10.

https://support.microsoft.com/en-do/help/4027667

2. Use the Activation Problem Solver to solve simple errors. See the following instructions for more details.

3. If the error continues, review the following list of error codes and follow the suggested steps to resolve it.

4. Make sure the error has not changed. Sometimes, when you run or try to activate the Activation Troubleshooter, they change the error code and the message. If you have changed, look for the new code below and follow the recommended steps.

 

Windows 10 will not activate Error code 0x803F7001

thanks
I activated my Windows 10 from product key Windows 7