If you don't do a complete wipe then this isn't fixing a one time security problem, it's fixing constant problems. Everything she ever does on that computer is

If you don't do a complete wipe then this isn't fixing a one time security problem, it's fixing constant problems. Everything she ever does on that computer is now public for all intents and purposes. Unless she literally never does anything that you wouldn't feel comfortable doing in front of a malicious stranger then you HAVE to wipe it.