Yes, unless you are absolutely certain that you have found the correction setting to disable, which, as stated already is "wake on ring" or "wake up on ring" you are probably better off leaving it alone. But if you do find the correct setting you must not only set it to disable but when you exit you have to "save" your changes, which you will find as you exit the bios.
Or, if you have a friend who has more knowledge of bios then you might want to ask for their help as they can also show you quite a few other settings that might be handy for your computer!
Good luck.
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