You install Windows 8 on a desktop computer and install a third-party desktop app. The computer runs
optimally until you install another third-party desktop app.
You need to remove only the most recently installed third-party desktop app.
You start the computer from a system repair disk.
Which troubleshooting option should you use?

A.
Remove everything and install Windows

B.
Refresh your PC without affecting your files

C.
System Restore

D.
System Image Recovery

Explanation:
http://www.bleepingcomputer.com/tutorials/windows-8-system-restore-guide/