Slow Internet speed is caused by several factors including inadequate hardware connections between the machine to the wall; an incorrectly configured modem or router; an older network interface card; spyware or malware; and an outdated domain name system. In addition, radio or microwave interference may degrade an Internet wireless signal.
Slow Internet can occur as a result of factors within or beyond the user’s control. The type of Internet provider being used and the computer's features can affect connectivity and computer performance. The speed of Internet connection via wireless may be influenced by the location of the computer and whether other wireless devices are within the same area. Doing a speed test helps to identify whether a computer has connectivity issues. Some problems may be resolved through troubleshooting procedures.