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Windows 7 users will have a product key sticker. You need a legal Windows license or the new install will be in trial mode.For example, you can replace Windows 10 Home 32-bit with Windows 10 Home 64-bit.
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It’s easy to get hold of a Windows 10 ISO image, burn it to DVD or write to USB and do a clean install. It’s also a good idea to clean install Windows 10 after upgrading so you are not transferring problems from your old Windows install. Simply using Windows over time will eventually degrade its performance. It doesn’t really matter what version of Windows you have, the best way to get your system working at its full speed and as issue free as possible is with a clean install of the operating system.
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