I had the same problems/symptoms, except my CPU usage was at 99% all the time (even after I quit the game!). Must be some kind of memory leak or infinite loop.
If you open your task manager, do you have lots of DsmUserTask.exe Tasks running?
If so: Kill the svchost.exe with the Process ID, that started the DsmUserTask.exe processes.
By running taskkill /F /IM DsmUserTask.exe /T you can kill al the DsmUserTasks.exe. It also shows you the Process ID of the Task that started those. In your task manager go to the details-tab, sort by PID, and search for the task with the corresponding PID - should be a svchost.exe task. Just kill it and you shoud be fine. CPU usage immediately went down to normal for me.