Method and system for detecting computer viruses during power on self test
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Apr 16, 1996
Grant Date -
N/A
app pub date -
Nov 30, 1993
filing date -
Nov 30, 1993
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A computer system includes a system processor, an information storage apparatus, at least one booting device from which the computer system can be booted, and a detection apparatus for detecting a computer virus during a boot sequence for the computer system. The information storage apparatus contains information including cyclic redundancy check values for a Master Boot Record and for an operating system selected for booting. These CRC values are computed when the Master boot record and the operating system boot record are known to be free from computer viruses. The detection apparatus comprises: (1) apparatus for reading the master boot record and operating system boot record from the selected booting device; (3)apparatus for determining whether the boot records are valid; (4) apparatus for passing control of the CPU to the boot record of the device when it is determined that the boot record of the device is valid and for presenting a message to a user indicating that the boot record of the device is not valid, in the event that the boot record of the device is not valid.
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