New-style apps are downloaded and maintained from a trusted source, the Windows Store, and they run in sandboxes that prevent them from doing bad things. They should only be downloaded from the original source (the software company) or a trusted alternative, such as Major Geeks or Ninite.
Traditional programs are usually the most powerful but also the most dangerous.
Third, there are in-browser programs that work with your log-on email address, which is your Microsoft Account. Second, there are new-style apps such as Mail and Sticky Notes. First, there are traditional Windows programs such as WordPad. Windows 10 already includes almost everything the average PC user needs, with three different types of software. I’m a Mac user and haven’t set up a Windows machine for many years so I’d appreciate any advice … except “get her a Mac/Linux” from below the line! Stuart I used to follow the same procedure when setting up a PC for the first time: I’d install AVG anti-virus, Zone Alarm, CCleaner, Spybot Search and Destroy etc. My daughter has asked for a Windows laptop for Christmas, for schoolwork and games.