I come back here to give some news and especially to tell you that this evening I managed to find the origin of the problem and to solve it. Almost completely by chance, by the way. Let me explain briefly, do you ever know maybe it will be useful for some.
I was going to reset Windows 10 as a last resort, when I remembered having moved all my Win10 personal directories (Documents, images, music etc ...) to my 2nd hard drive "tray". D:. So I re-moved the Documents directory to his original location (where Windows originally created it) on my drive in SSD.
BINGO !! No more freeze!
For some strange reason, when you kill, or exit your inventory by pressing TAB, the game accesses your DayZ directory which is in "Documents".
If like me for the sake of lack of space on the SSD you move all these Windows personal directories on your tray disk (because generally much more space on it ...) and well concerning DayZ this will cause you a problem which obviously often accesses in game to the config files found in Documents\DayZ!
For proof, in the Windows performance tab, looking at the graphics of the GPU and the hard drive tray, indeed the GPU load drops (from 100% to 47%) correspond to the second close to a peak in the use of the hard drive (0% to 45%).