OMG, On the windows installer pop-up, I clicked browse, and there was only 1 file to click on, so I seclected that and clicked OK, avast installed perfectly!
Why would it need that C++ thing and why did it ask me to put in a disk when avast is downloaded off the internet?
This is a package that belongs to MS, and should have been installed by MS or updated during the last Windows Update. For some reason, it didn’t happen with your machine. But it now looks like things are working out fine for you. Avast requires this file for it to work properly.
Please let us know if you have any additional questions. Thank you.