Malware, short for malicious software, is the general term for viruses, trojans, worms, adware, scareware, spyware, rootkits and other unwanted and often malicious software. The category names aren't important - they usually describe what the malware does or how it spreads.
The main purposes of modern malware are usually criminal. They intend to control your computer either to monitor your activities for targeted advertising campaigns or to steal information that could be used for fraud, or to use your computer for some purpose such as attacking a web site for extortion purposes or to send junk mail. Thousands of new malware variants are created every week, so even if you have up-to-date anti-virus software, there is always the possibility that it doesn't know about the very latest versions of malware (which is why the malware creators change it so often). You may therefore become infected even if you have a fully-updated security suite.
Most of these infections can be removed at your premises, usually within a couple of hours. Contact us for more details.