Download the desired theme from the Microsoft website.Ģ. If you want to install one of Microsoft’s themes, it’s very straightforward.ġ. We’ll first need to loosen Microsoft’s restrictions on theme installations. Non-Microsoft themes can’t be installed by default, however. However, the most interesting themes are available on sites like DeviantArt where independent designers create their own packs. Microsoft actually makes quite a few available from their own website. Once you learn how to install your own themes, make sure to check out our list of the best Windows 10 themes. Whether you want to stick to the safety of Microsoft’s official online theme collection, or peruse some of the incredibly creative Windows 10 themes at DeviantArt, we’ll show you how to install custom Windows 10 themes, along with all the necessary precautions.