Hi Serg
Windows 10 does have a lot of processes running in the background, this is normal, you may have 70 - 80 versions of Svchost running, those do not take up much resources and will not slow your PC down . . .
Turn off all unnecessary startup applications and processes:
Press Ctrl + Shift + Esc to open Task Manager
Click on the Startup Tab
See any non-essential items are listed there
If so, select and click 'Disable'
Close Task Manager
Click your Start Button, type msconfig and hit Enter
When the System Configuration dialog opens, click on the Services Tab
Check the box marked 'Hide Microsoft Services'
In the remaining list, see any non-essential items are listed there, uncheck any you find
Click Apply and OK
Turn off all unnecessary Background Apps
Open the Settings App
Go to Privacy - Background Apps
Turn off any App you do not need running in the background
Restart your PC