Thank you to all that responded with such helpful advice and insight. What I did by not responding to my neighbor was a bitter-sweet situation. She is sick and her computer is her only source of socialization because I don't see anyone coming to visit her.
If she hadn't approached me in such a malevolent manner with an accusation of having done something weeks ago that now her computer is not working, I would have helped out, but now I won't enter her apartment let alone fix her computer.
Thank you all for taking the time I really do appreciate each comment!