A lawsuit from 2007, has finally proven that Dell made efforts to conceal known issues in it’s desktop machines…

For example, the Times says that Dell conducted a study in 2004 and concluded that a minimum of 12 percent of its SX270 Optiplex machines would have problems over three years (the same study also included the GX270). The company eventually raised that minimum expectation to 45 percent later that year, with the possibility of the failure rate reaching as high as 97 percent.

See the rest of the information at Dell knew about computer failures, hid info from customers.