disable all keyup/keydown/keypressed events present on page

you can use preventDefault() function to solve it

You could do it this way, though I expect it might be horrendously slow on larger pages:

$('*').off('keyup keydown keypress');

That's going to select every single element on the page, then remove any keyup, keydown, and keypress events that are bound to them.

If you want to prevent the user from using the backspace key to navigate to the previous page, you could try the following code:

var inputTags = ['INPUT', 'TEXTAREA'];

$(document).on('keypress', function(e) {
    if(e.which === 8 && $.inArray(e.target.tagName, inputTags) === -1)
        e.preventDefault();
});

That should restrict the use of the backspace key, except in instances where the focus is an input element where you can enter text (so an <input type="text"> or a <textarea>).

Take a look at this working demo.

Try

$(document).find('*').off('keyup keydown keypressed');

and you should put this into the $(document).ready() block, after all the loaded JS on page (before </body> tag, for example).