What do you mean how to navigate around? You do it the same was as you would normally. If your mean how do you get into safe mode the answer is F8. Restart your computer and just keep hitting F8 like no tomorrow. You will get a list that comes up and says safe mode, safe mode with networking, or safe mode with command prompt. Normal safe mode is all you should need. Read the message you are getting though when it says its too big to delete. It might be telling you its too big to put in the recycle bin, but you can still delete it.