Computers can run for many years with no problems whatsoever however from time to time things can go wrong with devastating effects.
It is a good idea to maintain your computer from time to time this can prevent needless expense or worse a loss of files and data.
There are two main types of computer maintenance these are physical maintenance to the actual computer and the other is maintenance of the file and operating system.
Maintenance of the file and operating system includes operations such as defragging, registry repair and file sorting.
Physical maintenance involves an actual inspection and cleaning of the internal parts.
The frequency of this largely depends on the environment the computer is kept in or how dusty that environment is.