I got in a acer laptop, the owner claims a update screwed it up and wants me to nuke & pave, fine, she says it had win 10 on it. I format and install using the media tool without putting in her win 7 key, it installs fine but doesn't activate, so I assume shes lying, if she had it on before it should have activated, but I am reading where if I had put in her win 7 key during installation it may had activated, is this still true? I already wiped and put win 7 on and activated, but don't want to get deal with her saying it had win 10 on it.