Certifications sound like a great idea, and if I were in HR recruiting IT people, I could be forgiven for thinking that they tell me something important about a person's skills level. But I would be wrong.
Windows 10 S is the new edition of the client OS that is restricted to run only applications from the Windows Store. The advantage is that it is more stable and secure than an OS where the user can install software from anywhere. Microsoft has positioned the OS for the education market. But perhaps it has possibilities for the enterprise too.
Have you tried using OneNote recently? It is a free product from Microsoft, but it rarely gets a mention. Combined with OneDrive, it is a good tool for keeping track of different types of information related by topic.