Explorer no longer works

Hi all.
For some weeks Explorer.exe no longer starts when I am into the Virtual Desktop. Comodo stops Explorer.exe as it tries a memory access towards Virtkiosk.exe.
It’s very strange.
What happened?

Virustotal reports that my Explorer.exe is 100% clean and safe.

Once I applied this rule:

however Explorer.exe was not allowed to access memory of Virtkiosk.exe.
I fixed it. Solved.