Now, go through all the apps on the screen and right-click on each one.Click on the “Processes” tab in the Task Manager window.On your Windows PC, open the Task Manager by pressing Ctrl+Shift+Esc keys.However, sometimes, this can eat up a lot of CPU and primary memory of the device and can lead to the Rainbow Six Siege crashing issues.Ĭlose the apps running in the background on your device by following the steps given below. Most apps installed on your device keep running in the background all the time to download new updates, get notifications, etc.