A Windows 10 memory leak occurs when an app you were using didn’t return resources to your system when you were done using that app. When this happens, you can’t work on other tasks on your PC because your PC doesn’t have enough RAM to work with.
How to Fix Memory Leaks – Windows 10
In most cases, you can fix memory leak issues in Windows 10 on your own. You can close resource-intensive apps, disable certain startup apps, and perform similar tasks to fix a memory leak.
An easy way to clear the contents of your PC’s memory is to reboot your PC. This should fix the memory leak problem in most cases, at least temporarily, until you can find a permanent solution.
Windows 10 comes with a pre-installed tool called Windows Memory Diagnostic. You can use this tool to find and fix problems with your PC's RAM.