A computer user reports that their computer was $$fried$$ when surfing the internet during a lighting storm. The computer user states that they had the CPU, monitor, and printer plugged into a high$-$quality surge suppressor, just like the one they used for their stereo system. The stereo was on at the time, and it was undamaged. The user reports that the computer will still boot up and appear to run normally, but they cannot connect to their Internet service anymore. Further investigation reveals that the networking card in the computer has been damaged.

Based on the information provided, describe the most probable cause of this problem $($identify the power quality issue$)$ and recommend a realistic solution to help prevent this problem in the future.