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A computers and the Internet is an essential tool for this fast changing world. Nowadays cheap unlimited broadband connection can helps millions of people for their business and develop knowledge, but this is also brought a problem to your computer indirectly. some virus in the internet could damage and harm your computer enter. So if you have an Internet connection, definitely you should set a good firewall and install anti-virus software. This anti-virus software should be updated regularly in order to fight against new viruses. Some viruses can not be detected by anti-virus software; this virus can destroys any file downloaded from the Internet to your computer. Portland pc repair can give you friendly computer experts who explain the system problem and solutions well. If you are connected to the Internet, there are several types of viruses to attack your computer. It acts directly on the files are damaged, affecting performance and will not allow you to work even when you are offline. If this happened maybe you should call the expert on computer problem, like Portland computer repair which excellent expertise with removing virus. So be careful when surfing the net. Do not visit the sites that offer free software programs. This software sometime may contain virus. If you have a problem with your computer and need further information please visit pcmdinc.com.