Which of the following would be the FIRST step to take when troubleshooting an operating system
problem?

A.
Establish when the problem started and whether any changes have recently been made to the
system.

B.
Delete all temporary files and do a thorough cleanup and defragmentation of the system.

C.
Perform a System Restore and reboot the system and check whether the problem returns.

D.
Restart the system in safe mode and check whether the problem occurs again.