The amount of time required to reproduce these files can be very high. If there is only one copy, they can possibly be irreplaceable. If there is a major catastrophe and you have a backup of your data, it is simple to just reinstall the programs, restore the data, and continue working. The electricity coming out of the wall outlet is not always constant. If your computer is subjected to too much voltage delicate electronics can be destroyed.
Surge protector are available at most computer and office supply stores.
Ensure that you purchase a surge suppressor and not just a power strip, as power strips provide no electrical protection.