Computer maintenance is the practice of keeping computers in a good state of repair. A computer containing accumulated dust and debris may not run properly. Dust and debris will accumulate as a result of air cooling. Any filters used to mitigate this need regular service and changes. If the cooling system is not filtered then regular computer cleaning may prevent short circuits and overheating. A computer repair technician is a person who repairs and maintains computers and servers. The technician’s responsibilities may extend to include building or configuring new hardware, installing and updating software packages, and creating and maintaining computer networks.