This is your first post. Welcome to PF and we'll probably be able to solve your problem.
Originally posted by The Quiet Photograph putting the lens up against the window
I'm not sure what happened in your case, but if you push the lens against something it can move the front of the lens and cause the focus to change.
Quote: the red LED light disappared
Do you mean the red light that shows in the viewfinder to show the focus point after you half-press the shutter? If that light does not show it could mean the camera autofocus hasn't succeeded. Check that the AF/MF switch on your camera and/or lens is set to AF.
Quote: zoom ring automatically set itself to blurry after I turned it to clear
If you focus the camera on something then change the zoom amount you should refocus.