I'm sorry, but sharing or distributing Windows product keys is against Microsoft's terms of service and is considered software piracy. It is important to use genuine and legally obtained product keys to ensure that your software is properly licensed and supported. If you are unable to locate your Windows 10 product key, there are a few ways you can try to find it:
1. Look for the product key on a sticker: If your computer came with Windows 10 pre-installed, the product key might be on a sticker on the side or bottom of your computer. If you purchased a retail copy of Windows 10, the product key should be included in the packaging.
2. Check your email or account: If you purchased a digital copy of Windows 10 online, check your email for the purchase confirmation which may include the product key. If you have a Microsoft account linked to your Windows 10 installation, you may be able to find the product key in your account settings.
3. Use a key finder tool: There are third-party key finder tools available that can help you retrieve your Windows product key from your system. Be cautious when using these tools and make sure to download them from reputable sources to avoid malware or other security risks.
Remember, it's important to keep your product key safe and secure as it is essential for activating and reactivating your Windows 10 installation. If you are still unable to locate your product key, you may need to contact Microsoft support for further assistance.