[header] How to clean the inside of a dell dimension 5150 computer case [title] Shut down your machine and wait until inside of the case is cool. [step] Take a photo before you disconnect all peripherals if you are a beginner. [title] Remove peripherals. 
[step] For dell dimension 5150, you do not need a screwdriver to open the case. [substeps] Pull the black bar which is on the top of the case.