Do you need C++ an .net framework
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Welcome to the forum.
Can you give me your OS, 32 or 64-bit? Also what product of Avast are you using (Free, Pro, AIS)? 5.0.594 is the latest build...what are you using?
Have you checked in Add/Remove Programs to see if you have the Microsoft Visual C++ 2008 Redistributable Package installed on your computer? The recent MS Update that was done about a week ago also updated this package (depending on your OS) to a different version. Avast does use this, but not the .net framework, unless this is a requirement of your system.
Are you having problems running Avast or just a question re: the C++ an .net framework? Thank you.