So your windows 10 system is running slower than usual? Then you're going to need to run a diagnostics tool which is all known as a Performance monitor. This tool can review your system activity in real time and you can determine what's causing your windows system slow down. Follow the given step to access the performance monitor tool - Press the Windows Key + R and type perfmon, then click to "OK". Now, Go to Data Collector Sets > System > System Performance then right-click on the System Performance option and click on "Start" option. It will take a 60 sec test. After completing the test, go to "Reports > System > System Performance to see the results. For more read - https://allinsider.net/how-to-check-the-performance-of-your-pc/