Debbie just bought a new computer, and it's not working properly. She gets lots of popup windows. Leo says that it's likely that Debbie has been infected with malware. Leo says that Debbie is a prime candidate for something much simpler like a Google Chromebook or a tablet. Windows really requires knowing more about security.
Debbie will probably need to backup her data, format her hard drive, and then reinstall Windows from a known good source. Then run all available updates. Windows 8 has a restore feature that includes recovery discs in a hidden partition. So it's rather easy to go into Windows settings, choose to restore it and start over. Microsoft has a technote here that will walk her through that process.