The computer stops responding during idle operation, what should I do?

Question

Computers

I have a xiaomi notebook pro i5 laptop. During simple work, the browser + computer editor simply stops responding, all programs do not respond. At the same time, the temperature of the processor and video card is normal, the computer does not make noise. And the only way to fix this is to reboot the laptop. All programs are licensed, there is an antivirus, kaspersky. Windu reinstalled, cleaned of dust, changed the thermal paste. What could be the problem?