Windows Vista Service Pack 1 will make some well-known third-party security applications “experience a loss of functionality”, confesses Microsoft in a Knowledge Base article.

Popular applications include ZoneAlarm Security Suite, Trend Micro Internet Securiy and BitDefender AV or Internet Security.  A fuller list of programs, including specific program versions, can be found in the KB article.

Microsoft said in the article: “A program may experience a loss of functionality after you install Windows Vista SP1. However, most programs will continue to work as expected after you install Windows Vista SP1.”

Note: Microsoft says that the KB article: “should not be considered a comprehensive list of programs that experience loss of functionality when they run on a Windows Vista SP1-based computer.”

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