Use x64 (64-bit) for any modern system with more than 4GB of RAM. Use x86 (32-bit) only for very old hardware. How to Create a Bootable USB
You still need a genuine product key to activate Windows 7. Most older laptops have a "COA" sticker on the bottom or under the battery with a 25-digit code that will work for the specific version listed.
Here is a comprehensive guide on how to safely acquire a Windows 7 ISO and what you need to know before installing it. Is Windows 7 Still Available from Microsoft?
Use x64 (64-bit) for any modern system with more than 4GB of RAM. Use x86 (32-bit) only for very old hardware. How to Create a Bootable USB
You still need a genuine product key to activate Windows 7. Most older laptops have a "COA" sticker on the bottom or under the battery with a 25-digit code that will work for the specific version listed.
Here is a comprehensive guide on how to safely acquire a Windows 7 ISO and what you need to know before installing it. Is Windows 7 Still Available from Microsoft?