Why does Windows not allow to separate part of the memory from the disk even though there is enough memory?

Question

System administration

The bottom line is that I want to separate part of the memory from the already created and used disk to install another OS, but Windows protests as soon as it can.
I tried both Acronix and the standard Windows utility, Acronix reboots the PC, tries to execute and catches an error
, turned off both the paging file and hibernation, did defragmentation - nothing, that is, nothing changes at all.
Does anyone know what is causing this and how it can be fixed? I've been sitting on this for 7 hours already.
Windows - 10, 64 bits

Answer 1

And why do it from within the OS itself? Of course, the system will try to protect itself. But one has only to reboot from external media in some tool-recovery LiveUSB and run the appropriate tool from Acronis, Paragon or Aomei, as everything will be done in a couple of clicks, and no unmovable files will interfere.

Answer 2

The screenshot says in Russian - it is impossible to compress a volume beyond the area of ​​non-movable files.

Answer 3

Have you looked at what is offered to see Windows and the Acronix error code? Show the distribution of .