A MacBook Pro covered by the Apple Limited Warranty or by an AppleCare Protection Plan may receive a replacement foot without charge.
Replace the bottom case on your MacBook Core 2 Duo. Replacing the plastic bottom case. . Be careful not to put too much strength because it will break.
Learn how to remove the bottom cover on your HP ProBook notebook. To reduce the chance of ESD damage, work over a non-carpeted floor, use a static dissipative work surface (such as a Placing the bottom cover into position. Step 2.
Lay the closed case on a flat surface (a student's lap; the floor if lap is small). fingers around such that thumb and base of thumb shut the two open keys nearest the bottom end. Put the bell on the lower joint using small back and forth turns. 4.
floor mounted case fan should always be intake, as it draws in cool air I would suggest putting your computer on a table to reduce dust/dirt.