Why won't my antivirus utility let me reinstall my favorite programs

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 You're probably seeing an error message or alert from your antivirus program whenever an installation wizard tries to install software. This happens more frequently than you might think¡ªand it's perfectly normal. Remember that antivirus software not only searches files for fragments of malicious code (known as signatures) that signal the possible presence of an infection, but it also monitors any attempts to make changes to key system files because this is the type of action that viruses often initiate.
 
 When you're installing either software that's been downloaded from the Internet or commercial software that's never been on your system before, you should take virus alerts very seriously and contact the software developer(s) for assistance. However, when you're reinstalling an existing application (usually from CD-ROM) that had been running fine previously, chances are that your antivirus software is detecting normal system file changes as a potential attack.
 
 It's best to exit the installer and update the antivirus software before continuing with an installation. Doing so can help ensure that you're using the latest antivirus software version and signature files. If the problem reoccurs, temporarily disable the antivirus software until you finish installing the application and then reboot the PC and/or restart the antivirus software to keep your PC protected.