Computer virus and Number system

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Across
  1. 3. How many bits are in a byte
  2. 4. Which was the first antivirus software
  3. 5. It us a technique used by antivirus programs for detecting virus
  4. 7. It is the first of virus
  5. 8. Base of decimal number system
  6. 10. It is a program but it is very dangerous
Down
  1. 1. What an antivirus have to save the files
  2. 2. Which number can easily represent two state
  3. 6. A nibble is of how many bites
  4. 9. Short form of vital information resources under seize