Unnecessary CPU usage

Hi, I have unnecessary CPU usage on my computer. I'm looking for the reason but couldn't find a solution. When I look at the task manager, I see 'System' increase rapidly. I am waiting for your help. OS: Windows 10 Pro. - Version :20H2 - Compilation: 19042.572 PC: MSI GF6 GF63 THIN 10SCSR CPU: Intel Core - i5 10300H