Faint window appearing at right bottom

[archit]

Hi.There is a small faint window,much like a pop up window,appearing on the right bottom side of my screen.It is almost transparent but the edges are distinctly visible.I cant get rid of it.Any help would be appreciated.Thanks

 

[Digerati]

That's not enough to go on. What is in the window? Is it to the right of the clock, left, or over top? Any text? What if you hover (put mouse pointer) over it? Does it become more visible?

When did the problem start? Can you see it Safe Mode?

 

[DallasDad]

Sounds like the "Show Desktop/Peek at Desktop" button.
If you hover the mouse on it, it should offer to "Show Desktop".
If you right click it, it should give you a choice of "Show Desktop" or "Peek at Desktop".