Some IT administrators using CA's antivirus software in combination with Windows 2003 found out that the two were incompatible. According to an advisory, CA eTrust was mistakenly identifying a crucial Windows file as a virus and deleting it. The file, Lsass.exe, is part of Windows 2003's own built-in security measures. When deleted, it causes the operating system to crash and not reboot properly.
The error was discovered and quickly corrected before the issue caused more widespread damage. CA has since offered affected users steps to repair the damage, which is caused by the file being mistakenly identified as the Win32/Lassrv.B virus. Computers with the DAT signature 30.3.3054 are affected, while 30.3.3056 corrects the issue.
Although commonplace, anti-virus false positives usually don't impact widely used software, but rather little known applications or games. In some cases, however, poor quality definition updates have caused major problems. In March, for example, an error within the virus definition file for McAfee's antivirus software marked several Microsoft Office components, some Adobe product applications, and several other programs as viruses [See: McAfee Gaffe Deletes Excel, Other Apps.] .
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