Acutest provide load and performance testing services for computer systems, infrastructure and software applications. This service includes stress, scalability, capacity and resilience testing.

http://www.acutest.co.uk

Over time, your computer progressively slows down and becomes less effective and unreliable. Because the slow down occurs gradually, you may not notice the loss of performance.

http://www.computergurutogo.com/computer-service-fresno-computer-tune-up.htm