When your computer is running in a dusty area its like having a vacuum cleaner that never gets emptied out.
What happens when you have a computer that is so dusty and dirty inside the computer case? Well most of the time you are looking at some point to damage the hardware inside the computer. Too much dust in the computer case can cause the computer to run much hotter then if it was clean. Heat and dust can damage computer hardware. In some cases it may damage your motherboard, fans, network cards, dial up cards etc.
It is very important to clean out your computer case at least 3 or 4 times a year. If you computer tower is on the floor or in an area that regularly collects dust you may want to clean it out more frequently. Remember that cleaning your computer is one of the most important things you can do to extend the life of your computers hardware.
All you need to do is bring it to me.