Mouse Loses Functionality Inside Guest

[FlashLopez06]

I'm running VB 5.1.30 on a Window 7 i7 x64 host. I have Ubuntu 16.04.3 LTS (xenial) running as guest.
(Let me know if more details are needed)

The mouse has been a huge problem. Whether wired/wireless, once I enter the VB it stop responding to specific clicks. Keyboard works perfectly.

What I've noticed after a clean VM start up:

1. Immediately cannot click anything in the guest, although the VM message at the top of the screen says I should be able to.
2. I click on this browser in the host to type item #1 then click back in the VM and I'm able to click on and open Firefox.
3. I am not able to command anything in Firefox with the mouse (close screen, drag screen, etc) until I click the top menu bar for Firebox, and then go back to the browser.
4. I am able to open Terminal on top of Firefox. Once open, same as item #3 for Terminal. I also can't click on Firefox to bring it to the front, but I can drag the browser around for some reason.

Meanwhile, commands with the keyboard all work fine.

I've already tried killing the process for VBoxClient --draganddrop and that does nothing.

I'm stumped.

[socratis]

although the VM message at the top of the screen says I should be able to

What "message"? What "top of the screen"? We're going to need to see a VM log from a complete VM run:

• Start the VM from cold-boot (not from a paused or saved state) / Observe error / Shutdown the VM.
• With the VM completely shut down (not paused or saved), right-click on the VM in the VirtualBox Manager and select "Show Log".
• Save only the first "VBox.log", ZIP it and attach it to your response (see the "Upload attachment" tab below the reply form).