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Most of the time, your computer is at risk of attacks from viruses and spyware when you are browsing the Internet. As soon as your PC gets infected by either of these two, you start to have an immediate effect. You will find that your PC is slowing down and at times it hangs in the middle with your monitor screen turning blue. Virus and spyware have other effects on your computer. Your firewall may have been affected, and suddenly, without your knowledge, it starts to send out strange traffic which consists of information relating to your personal data.

Virus attacks could take over your PC completely, so much so, that it starts to send emails to all the addresses it finds in your address book. A virus could initiate Distributed Denial of Service (DDoS) attack in large networks and could paralyze the whole operation. For detecting virus and malware in your computer system, you should have your PC scanned by web-based free PC scan which can detect various kinds of Internet security threats in your computer such as viruses, worms, Trojans, and spyware.

Free PC scan is an online free tool which is designed to scan your computer for any malware or virus that may be slowing down your PC. It scans for wide range of Internet threats which include known viruses, and spyware programs. Free PC scan is a web-based tool which also detects any vulnerability in your system, and provides you with links to web addresses from where you can download the security patches which are missing. Generally these tools provide you with a report, detailing out the security threats that have been found in your PC.

You need to take care when choosing the right free PC scan tool. There are several such web-based tools which intentionally put viruses into your system. In fact the tool itself is malicious software which crowds your system with threats, and at the end of the scan provides you with a report of the huge numbers of viruses supposed to have been found in your PC. Thereafter, you would find an odd looking tool bar hanging underneath your browser head with continuous pop-ups asking you to purchase their software to remove the virus.

There are various kinds of indications when your system gets attacked by virus or spyware. At first, your system may get slow and later hang. A tool bar may appear with your browser, one you have never seen before. The browser would automatically take you to a different website than the one you wanted to browse, and more specifically, if you find that you are not being able to run Windows programs like “Msconfig”, or REGEDIT, it is almost certain you have virus in your system. You can search for free PC scan utilities on the Internet, and one of these web-based tools can help you detect the virus and the malicious software in your computer.

The best way to select one of these free PC scan utilities is to go through the user reviews that you can find on the Internet where all the different features of the available tools are discussed. The observations made in there could help you select one of these tools. To avoid permanent damage to your computer system, it is necessary that you are aware of the various Internet threats which can paralyze your PC. Virus may destroy all your data in your hard disk, and malicious software could change your Firewall and browser settings with your personal information going out of your PC to someone on the net. Free PC scan would scan your computer and provide you with a report on the types of viruses and malware found in your system.