3.5 Widget Problem – I'm stumped

After going through the forum it’s obvious there is something funky with accessing the widgets and changing them. I have tried disabling all my plugins – no change. I also loaded the Twenty Ten theme to rule out my commercial theme – no change. I am most likely going to have to use 3.4.2 as this seems allow the widgets to be working . I would prefer to be using the most recent version of WP for security reasons.
Someone posted a supposed “fix” :

FIX( without deactivate plugin)

Add following code on line number 58 (in widget_logic_visual_admin_enqueue_script() function)
wp_register_script(‘jquery.1.7′ ,plugin_dir_url(__FILE__).’js/jquery-1.7.1.min.js’);

wp_enqueue_script(‘jquery.1.7’);
and upload jquery1.7.1.min.js in plugin js folder

I can’t make heads or tails of this as I am not a programmer. If this is indeed a fix can someone dumb it down and explain how to implement this in steps? I need to know where to insert this code and how to update to jquery 1.7.1
It would really be appreciated.