problem with installation

hello, I uninstalled my Norton antivirus in favor of installing avast…however, once I started DLing the Avast setup file, it stopped about 35% in and said could not find source or something? I have Windows vista, not sure if that has anything to do with it…now I am without an antivirus program though…help appreciated. thank you.

You should have waited until you successfully downloaded avast before getting rid of Norton.

Where did you download avast from ?

If you used CNet/download.com that can be very busy, so I suggest you download directly from avast. Download the latest version of avast http://www.avast.com/eng/download-avast-home.html scroll down that page past the CNet link and select the avast download link for the language version you would use.