Windows 8.1 or 10 users will either have a separate key if Windows was purchased as a standalone product or the key will be embedded in the system BIOS. Windows 7 users will have a product key sticker. You do need a legal Windows license or the new install will be in trial mode.For example, you can replace Windows 7 Home Premium 32-bit with Home Premium 64-bit. You can switch between 32-bit and 64-bit as long as the Windows edition is the same.If you have Windows 7 Home Premium, for example, you must install that same operating system again. Your Windows license only allows you to reinstall the edition of Windows that you have a license for.Things to know about Windows ISO images and Reinstalling Here we show you several ways to download the ISO you need so Windows can be installed cleanly and safely.

Microsoft doesn’t even want ordinary consumers to download a Windows 10 ISO direct anymore and instead pushes you to use the Media Creation Tool.Thankfully there are ways around these obstacles and it’s possible to download Windows 7, Windows 8.1 and Windows 10 ISO images directly from Microsoft’s own servers, whether it’s through an officially recommended method or a workaround. It used to be easy to download Windows 7 ISO images until they were all removed from Digital River after sales of Windows 7 were discontinued in 2014.

The best way to guarantee you are getting a clean and untouched Windows ISO image is going directly to the source, which is Microsoft themselves.

Modded version of mac for windows