Before beginning hardware repair work on a PC, which of the following is the FIRST step?
A. Install an uninterruptible power supply (UPS).
B. Disconnect power from the PC.
C. Ensure all Windows updates have been installed.
D. Degauss the monitor.
CompTIA A+ Question I-92
Which of the following will provide the BEST protection against power failures and data loss?
A. Auto-switching power supply
B. Uninterruptible power supply
C. Line conditioner
D. Surge suppressor
CompTIA A+ Question C-67
Which of the following provides the BEST protection from brown outs?
A. Surge suppressor
B. Computer power supply with built in surge protections
C. Motherboard with built-in surge protection
D. Uninterruptible power supply