Fullscreen function does not work

[Golddouble]

Version 0.9.2

1. I start my Windows 7 VM
2. Menu->View->Fullscreen
3. the mouse arrow is white. It does not work.
4. I press Ctrl+Alt+G -> Nothing happens
5. I press Ctrl+Alt+0 nothing happens
6. I press Alt+Tab and stop the machine in Aqemu

What's wrong? Thank you.

I have tried out all "Graphics".

MX Linux 19; Intel i5 generation 4. 8 GB RAM.

Edit:
Also after having installed the packages of the following list, that were missing, did not solve the problem:
qemu-kvm libvirt-daemon libvirt-daemon-system virtinst libosinfo-bin bridge-utils virt-manager qemu-system gir1.2-spiceclientgtk-3.0 ovmf ebtables dnsmasq

Edit:
Is it enough, just to install the package aqemu 0.9.2-2.3 ?

Edit:
I found out, that I have to left click with the mouse, after I have a working mouse arrow.

But there is another problem:
When I make my fullscreen not in the started VM itself, but with the settings:

In this case my VM starts in Fullscreen. But it is very big. On my screen I can see only about 1/4 of the full screen. The mouse arrow does work. But when try a right click, nothing happens. When I press Ctrl+Alt+G: Nothing happens. When I try Alt+Tab: Nothing happnes. When I press Alt+F4: Nothing happens.
To get away from this screen I must press the power button on my PC for some seconds. Then the VM closes. There is no ather way to close it.

What I have always done:
When I install https://www.spice-space.org/download/windows/spice-guest-tools/spice-guest-tools-latest.exe nothing changed. No idea for what this is good. This exe does not change anything in my VM experience:

USB-Stick does not work in myx guest (It's just not there).
shared folders does not work in mx guest. (It's still not there).

No Idea: Is Aqemu garbage?
I have not found a guide for Aqemu. Ins't there any?

Just frustrated.

Qemu guest agent is closed:
If spice-guest-tools was installed correctly, should they not appear in the services? The services "Qemu guest agent VSS Provider" and "Qemu-GA" appear there. I would expect them to be active, because what is the use of spice-guest-tools if they are not active? However, they are closed. Strange.
I haven't found a service that starts with spice. Only services that start with Qemu... with Qemu. I don't know what to look for either.