Developers with active subscriptions can download verified, untouched ISOs directly from the Microsoft subscriber portal.
When installing Windows 7 today, you may encounter these common hurdles:
Need help finding your product key? Check the sticker on your PC case or use a tool like ProduKey (from NirSoft) on an existing installation.
Visit the official Microsoft Store or the Microsoft website. You might find Windows 7 listed in their store or through their customer support, especially if you're looking to reinstall it on a machine you previously owned or have a valid product key.