Computers cannot be protected from all system failures. To guard against this be sure that backups of the system are made on a scheduled basis. Also be sure to perform all regularly scheduled maintenance. It is also suggested that an uninterrupted power supply always be connected to the system.
why readabilities only for hardware not software
hardware, or software failure, more than likely not a virus.
Fault tolerance
A VDU is hardware.
Should be obvious. Hardware faults are problems with the hardware. Software faults are problems with the software. Hardware = physical components of the computer (i.g. motherboard, hard drive, power supply). Software = computer programs
A scanner is both hardware and software, the device itself is hardware (all devices are hardware) but the driver(a program) that runs it is software.
hardware
A microphone is hardware. Software is what programs and games are called.
To prevent software privacy you can protect your program with a CD key or a hardware key. This will require people to own the CD and box of the product, only available in stores.
both a hardware and software
Motherboards are hardware components, not software.
Have to be hardware. How could you write software if there were no hardware to write it on?