Virus Scanner A virus scanner is special software that detects known computer viruses, worms, or Trojans, blocks their access and, if necessary, eliminates them. A virus or worm often spreads independently over the Internet and can cause various types of damage to the PC. These range from impairments in computer performance, damage to software and hardware, transfer of personal data stored on the PC, or even damage to the operating system. Therefore it is nowadays more and more important to use a virus scanner to avoid such damage. A distinction is made between different types of virus scanners. the real-time scanner (on-access scanner) always works in the background and scans all programs, files, folders, or the main memory. However, an on-access scanner alone does not provide complete protection against malware (unwanted software that damages the PC), for example. Since a real-time scanner reduces the performance of the computer, some…