Why won't MATLAB open?

I had started working on MATLAB a few weeks ago. Even though it had been just a few times, it seemed to work properly. For the past few days, whenever I try to open it, the logo appears for a fraction of a second on the taskbar and then nothing happens. Attempts to open it again yields no results. The multiple instances just sit in the Task Manager using up a ton of CPU, but not closing even when I try to End Task. Running as administrator also doesn't seem to work.

[Rik]

I presume you have tried a reboot already. If so, did you try a re-install? Basic support is available for just about any valid licence, so I problems persist, you could also try the contact us button at the top of this page to reach the Mathworks support directly.

[Jan]

Did you include a folder on a OneDrive or DropBox in Matlab's path?