After logging in to my system, the dash, top panel and title bars of windows are not being displayed. I tried opening dash by pressing the window key but it was of no use.
On my desktop, I had two shortcuts to some folders I use regularly. Using it I was able to open the nautilus explorer which let me realize that also the title bars are not being displayed.
Despite the comment at the start of this answer, I tried it never the less. Surprisingly, it seems
compizconfig-settings-manager was already installed on my system and the
Ubuntu Unity Plugin and
Enable OpenGL checkboxes were already checked. I may have installed it when this system used to be an older version of Ubuntu but I don't remember doing it.
I also tried the following (again expecting it to work against all odds).
But the issue persists.
I thought of trying to get a screenshot but it would just have been my wallpaper with the two icons or maybe the title bar less window of nautilus. I don't think it would have helped anyway.
This system used to be
14.04 which I had then upgraded to
16.04. It used to work fine up until yesterday. I don't know what happened now.
Really need help with this :(
As I mentioned, I've already tried most of the solutions given against this question; None helped.