What eats up all the RAM 8GB?

Question

Iron

I reinstalled Windows) the computer is clean. I checked the kaspersky antivirus.
When launching a detect, the workload of the operative is 15% in an hour 97%, while one browser with one tab works) Processes turned off all unnecessary ones) On the performance tab, it does not show where the memory has gone) Help) And also the CPU is also heavily loaded up to 75% What could it be ?

Answer 1

If Windows 7ka:
1) turn off the Internet, install Windows6.1-KB3102810-x64.msu (or x86 version), turn on the Internet
2) reboot, start searching for updates (should be found in a maximum of half an hour, set)
3) if there are no updates, then run WindowsUpdateDiagnostic.diagcab and repeat step two