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The knowledgebase is organized into different categories; please select a category that you are interested in. You can also search the entire knowledgebase by entering keywords in the navigation bar beside this text.

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 avast! and other antivirus applications
 Should I remove other anti-virus programs (Norton Antivirus, McAfee, AVG, Kaspersky Antivirus etc.) before installing avast!?AnswerYes. Using two or more antivirus programs can cause problems and the operating system
 How can I uninstall avast!?
 How can I uninstall avast!?SolutionYou can uninstall avast! just as any other software - using ADD/REMOVE PROGRAMS in Control Panel. If any problem appears, use the
 I don't have ODBC drivers installed..
 My new avast! setup is warning me that I don't have ODBC drivers installed. How exactly do I get them?SolutionYou can download the ODBC drivers from Microsoft webs
 Invalid file signature
 I just downloaded avast!, and when I try to install it, I get this message: "Invalid file signature. Error 2000000B"... What's the problem?SolutionThe problem is that the downloaded file is corrupted. The ea
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