Server status page says that there are over 7700 wus in queue, but my pc:

26/06/2021 18:12:09 | nanoHUB_at_home | Requesting new tasks for CPU
26/06/2021 18:12:11 | nanoHUB_at_home | Scheduler request completed: got 0 new tasks
26/06/2021 18:12:11 | nanoHUB_at_home | No tasks sent

Is a scheduler problem??

Virtualization Virtualbox (6.1.22) installed, CPU does not have hardware virtualization support

https://boinc.nanohub.org/nanoHUB_at_home/show_host_detail.php?hostid=11466

Maybe you changed your BIOS? You may have to reenable VT-x.

And then remove line <p_vm_extensions_disabled> from client_state.xml

Maybe you changed your BIOS? You may have to reenable VT-x.

Virtualization is enabled (i run VirtualBox machine without problems)
I cannot understand why the site says that "CPU does not have hardware virtualization support"
From Intel site:

Intel® Virtualization Technology ‡ YES
Intel® Virtualization Technology for Directed I/O ‡ No
Intel® VT-x with Extended Page Tables (EPT) ‡ YES

And then remove line <p_vm_extensions_disabled> from client_state.xml

I open the file xml and there is:

<p_vm_extensions_disabled>0</p_vm_extensions_disabled>

This is interesting. In the Stderr for the computer that works, it says:
Detected: VirtualBox VboxManage Interface (Version: 6.1.18)

For the computer that does not work, it says:
Detected: VirtualBox VboxManage Interface (Version: 5.2.44)
even though it says "Virtualization Virtualbox (6.1.22) installed".
So there is an installation problem of some sort.

I would completely uninstall VBox, clean the registry, and try again. And for Win 10, I would use 5.2.44.
https://www.virtualbox.org/wiki/Download_Old_Builds_5_2

Also, be sure to disable Hyper-V.
It is incompatible with VirtualBox.