When do I need a new computer?

Commercial PCs usually last about 3 years
Domestic PCs usually last about 5 years

Commercial Macs usually last about 4 years
Domestic Macs can still be working after 7 years

Commercial Laptops usually last about 4 years
Domestic Laptops usually last about 6 years
Laptops take longer to expire because of their size. People are prepared to put up with their lack of features because they make few demands on their space. Consumers should beware that a new trend in low cost low specification laptops can reduce the estimated usefulness figures above by at least 1 year.

Commercial PCs will wear out faster simply because they're used more and suffer greater demands to remain fully functional, secure and delivering the advantage of modern technology.
Domestic PCs will linger with deference to family budgets.

Figures based on 15 years engineering experience in the Cambridge Region