Ever since I got my new laptop back in April, I’ve been running the latest version of Ubuntu on it. Sometimes though, I do have the need for Windows (when I need to use Visual Studio, for example). In those cases I have a virtual machine with Windows XP installed on it, and any of the often needed Windows utilities available. This worked great for me in previous versions of Ubuntu, but with the new laptop came a weird problem: The VM was transparent. Not completely transparent, but maybe 40% transparent.
Luckily there is a quick fix for this. With your mouse pointer inside of the guest operating system, make sure the “host key” is disabled, and then hit windows key + c. That should remove the transparency and you’ll be good to go.