Product key for windows7

Check for a sticker on the bottom of the laptop or inside the battery compartment (if it's a removeable battery).

What model is it?

The Windows 7 product keys are mentioned above. All of the keys will surely activate the windows but they might not work if Windows update feature on your PC is turned on. Make sure to turn it off otherwise the license key will be detected and activation may fail.

Activate Windows 7 by using a command prompt
The process is easy to make sure to follow it step by step.
Open a command prompt by typing CMD as administrator into Windows search.
Now type slmgr-rearm in the command prompt.
Press Enter to continue.
Just restart your PC and you will receive a prompt to update windows without entering a product key.
Open the command prompt again and type slmgr-ato.
Press enter again. You will receive a prompt that windows 7 is activated.

Greeting,

Rachel Gomez

please re solve this.