There are a few things that you can do to make Windows 10 use less RAM. One is to disable certain features that you don't need, such as the search indexer and background apps. You can also try using a lighter desktop environment, such as Xfce or LXDE. Additionally, make sure that you're not running any unnecessary programs in the background. Finally, if you have a lot of RAM, you can try increasing the size of your pagefile.