Question

after working without problems for a couple of years, your computer has begun to lock up. you suspect that it is a thermal issue, but you cant find any component that is not functioning correctly. you have not replaced the cpu or installed any new devices. the cpu cooling fan and the power supply fan are working properly. the lock - ups are happening with increasing frequency. which of the following is the most common condition that explains these symptoms? the bios has never been flashed and has gotten more and more out of date. the power supply has been switched to the wrong voltage setting. an accumulation of dust has gradually built up. the internal temperature sensor is beginning to malfunction intermittently. i want to review this question later. (optional) check my answer (optional)

Explanation:

Dust accumulation can cause over - heating issues in computers over time. Even if fans are working, dust can impede proper heat dissipation, leading to system lock - ups. An outdated BIOS usually causes compatibility or configuration issues rather than thermal - related lock - ups. A wrong power supply voltage setting would likely cause immediate problems or damage rather than gradual lock - ups. An intermittent internal temperature sensor malfunction would not be as common a cause as dust accumulation for thermal - related lock - ups.

Answer:

C. An accumulation of dust has gradually built up.