Windows 10 - Verifying your system image

While I was merging a small unused portion of the drive with the Windows 7 partition, something went wrong, and I couldn't boot the system back up until I put the disc into the DVD drive, and repaired it. 

When that repair was completed, I found that there were a couple of folders duplicated in Windows 10, so the fix for that is to run DISM.exe, which is the Deployment Image Servicing and Management tool. It's like using System File Checker, but on steroids. It can correct and confirm your system image and restore it to its official version. Here's what it looks like when completed....

As it is working, it draws that dotted line across the window in 20% segments, and then tells you whether or not it could restore your system to its default. To learn more, open Windows Powershell (or a Command Prompt) in Administrator mode, and then at the cursor, type DISM.exe /? to get a long list of its features.