Method and apparatus for protecting a computer system from computer viruses
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United States of America Patent
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Apr 23, 1996
Issued Date -
N/A
app pub date -
Oct 22, 1993
filing date -
Apr 22, 1991
priority date (Note) -
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Abstract
An apparatus and method for protection against attack by computer virus. Detection and prevention of a virus attack at boot time is achieved by write-protecting the storage devices of the system before the booting process and by detecting the presence of virus by checking integrity of the interrupt vectors of the system. Similar checks may be run on the system modules, device drivers, and application programs, using, for example, a checksum to insure that no further viruses are present in those programs.
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