Why does the workstation show uptime for tens of days, although it turns off every day for the night?

Question

Windows

There are several workstations on Windows 8.1 in the domain. They regularly turn off at night, but both the "net statistics server" command and the uptime.exe utility from Microsoft show an uptime of several tens of days. This is all reset in some random way (I haven’t caught it yet, unfortunately). Who faced and knows what to do - help, please!
They write that this is due to some new Windows boot mechanism (starting with just "eight"). Here: www.eightforums.com/tutorials/6320-fast-startup-tu... - how to disable. I tried and it really helped - the uptime began to be reset when the PC was turned off.
But it’s still not clear: why it didn’t start right away (immediately after installing Windows 8.1 on a PC, this didn’t happen), and why doesn’t this happen on all similar PCs? By the way, I checked it on other PCs, where everything is in order, and such a parameter, which is advised to be disabled, is also enabled in their registry! But they are fine with uptime. Unclear...

Answer 1

It?

Answer 2

Maybe it does not turn off, but which one goes into suspend, or even into hibernation?

Answer 3

No, I was personally present at the regular shutdown, because the first thing I also thought was that it was simply being "put to sleep" (for example, so that it would turn on faster in the morning). But no...

Answer 4

And in the new task manager, in the Performance tab - CPU, how much "Working time" does it show? As far as I remember, this information is taken from the registry, and it is unlikely that the system service itself, which changes this time, is to blame for this. Try to search on the Internet what programs can reset this value.

Answer 5

what systeminfo >>log.log shows to look in the folder of the user under which he launched