While it's good to give some attention to software settings, don't neglect hardware when it comes to PC maintenance. Dust and grime gather in the case, which makes it warmer and obstructs airflow. In the long term, this could cause problems so it's best to treat it.
Obviously, this involves opening the case of the PC so start by switching off and unplugging the PC and leave it to settle and cool down for a few minutes. Then open the case and use a vacuum cleaner with a long hose attachment to pick up loose fluff and dust. Do not use the vacuum cleaner itself, as the electromagnets in the cleaner will damage the computer.
Use a clean household paintbrush to brush dust off the case sides, cables and fans but do not brush any microchips, as you may damage them. Give the case another quick blast from the hose attachment of the vacuum cleaner and close the case, then plug it back in.
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