Speaking of which, many users reported CPU at 100% when nothing is running, and if this happens, it’s possible that you have a process in the background that is utilizing your resources. This includes both memory and CPU problems. This issue is present on all versions of Windows, and many reported Dwm.exe Windows 11 issues on their PC. Why does Desktop Window Manager high CPU usage occur? It’s a serious matter and although it doesn’t have an official answer yet, another user points out that is caused by a recent Intel driver bug. The same issue occurs on Windows 11 occasionally, and having your PC lagging because of service can cause a lot of frustration, especially for people who are working from home and their life depends on being able to run their PC optimally. Windows Process, Desktop Window Manager uses incredible amounts of resources after a few hours of computer usage causes black screens and software crashes. Here is what a user has to say about this issue on Reddit:

However, sometimes, this can go wrong and start consuming too many resources, causing black screen errors or software crashes.

It’s a regular process that you will find in the Windows Task Manager running smoothly most of the time.

Microsoft window manager