How to get out of screen saver without using ctrl alt del

My computer has for some time not allowed me to resume after going to the screen saver.
If you press any key the screen goes blank. The only way to get back to using the computer is ctrl alt delete and the press cancel. Any help would be appreciated.

Try to disable the screen saver, then re-enable it again. Wait for the screen saver. Hopefully this could be a very simple solution like so.