Why does the computer use all the RAM?

Question

Windows

Hello. The computer began to issue a screen of death. If it starts, then the entire RAM is used. That is, it is now 5GB and it is completely full. However, nothing is running on the computer.

Answer 1

RAM is ideally used completely for the same reasons that container ships rarely drive 50% full - it makes no sense. Therefore, free memory is used by the OS for the cache, and is released as needed.
If BSOD'y, it is necessary to look at their codes.
In any case, it doesn't hurt to check the memtest86 memory and look at the SMART disks.

Answer 2

First of all, we look at the BSOD code. Otherwise, empty talk