Which of the following can the technician do to make the laptop faster?

An end user’s laptop Is not as fast as when it was first purchased. The user wants it to revert to that point without losing any data. A technician examines the laptop and notices it has a magnetic hard drive.

Which of the following can the technician do to make the laptop faster?
A . Roll back the updates
B . Update the drivers.
C . Defragment the system.
D . Reinstall Windows

Answer: C