Repair windows (to solve minor problems)

Original post here

First:  

Using SFC (System File Checker) and DISM (Deployment Imaging Servicing and Management) to Repair Windows 8 & 10

(in short: Hit the Windows Key + X, followed by A then DISM /Online /Cleanup-Image /RestoreHealth then SFC /scannow)

Then, if that doesn’t work, choose whichever of these three instruction sets you prefer and do a repair install:

Non Destructive Repair of Windows 10 – Answers to commonly asked questions

Doing an In-place “Upgrade” to Reinstall Windows 10 Keeping Apps/Programs and User Files

How to: Perform a Repair Upgrade Using the Windows 10 ISO file