How to ensure that preventive maintenance on my computer?

Before you start cleaning , check around your PC for anything close to that would raise its temperature . Always turn off and unplug the unit before cleaning any of its components. Never apply liquid directly to a component. Spray or pour the liquid on a lint-free cloth and wipe the PC with the same cloth. Clean the case Clean your mechanical mouse Keep a clean keyboard Make your glowing monitor Check your power protection Clean your CDs and DVDs If your PC is more than four years or if the expansion cards plugged into its motherboard are exceptionally dirty : remove each card , clean its contacts with isopropyl alcohol and put in place. However, if your system date within a few years , make sure that each card is firmly in place by gently pressing down on the top edge and without touching its surface. Also, check the proper fit of your power connectors, EIDE connectors and other internal cables. The time you have the case open, familiarize yourself with the CMOS battery on the board mère.