Which action is not a possible result of computer system damage originating from viruses?

Redirecting power supply voltages is not a feasible outcome of computer system damage caused by viruses. Viruses typically operate by manipulating software and data within a computer system, rather than affecting the hardware directly, and power supply manipulation is a physical alteration that can be attributed to hardware malfunction or incorrect setup rather than software-related issues.

In contrast, reformatting a hard disk, erasing programs and files, and destroying disk directories are all actions that a virus can execute. A virus may be designed to delete files or corrupt data on the hard drive—a common tactic used in many forms of malware. Similarly, reformatting can occur if the virus is programmed to perform destructive actions that affect the file system structure, leading to loss of data and making the hard drive unrecoverable without proper backups.