A spokesman for the security vendor told vnunet.com that the error followed an incorrect update of the application's antivirus signature file, causing it to remove or isolate a file named 'isass.exe'.
The company released an update for its antivirus signature file within seven hours.
The isass.exe file is actually a system component for the Windows Server 2003 operating system. The antivirus software caused the operating system to crash, and rendered it unusable in some cases.
Such false positives are a regular problem for antivirus vendors. Sophos mistakenly claimed in February that several Microsoft Office and Adobe Acrobat Reader components on systems running Mac OS X were infected with the Inqtana virus.
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