I had Windows 7 running very nicely in VirtualBox. However, yesterday, I set it to full screen mode. After I was done with full screen mode, I exited out of it and shutdown the VM. I started it up this morning, and I no longer have the option to go full screen, and my Windows VM resolution is not maxed out at 1024x768, much lower than it was before. Also, when I look at the window of the VM, I no longer have the VirtualBox menus. I'm attaching a screenshot of my VM window here so you can see that I no longer have the VirtualBox menus above and below the screen.
Thanks in advance for your advice. Have a good day.