The laptop is a LenovoX220T that had been upgraded from windows 7 to windows 10. I would like to at least take all the programs off she won't use and get rid of any browser info and files that maybe inappropriate. I will do a clean install if that's what you all recommend but it has to be really easy with step by step instructions as I don't want to end up with a brick. FWIW I have no OS disc or keys I just took advantage of a free windows 10 upgrade when it came out. Thanks!!