Try downloading the file to your desktop, I download everything to my desktop for ease of scanning before executing.
I also recommend AVG 7.5, I tried 8.0 once and it slowed my internet to a crawl, you can download 7.5 here:
The download button is in the top of green column on right side..
If you really want the latest, download here:
Download 8.0 from this site to your desktop, and it should put an executable icon right there, double click it to begin....good luck.
I downloaded the latest version of AVG today. It comes thru as a .php file and I saved it to one of my directories. What do I do now? The website of the maker of AVG says somthing like "launch it" (i forget the exact wording), but it is not an .exe file. I dont even know what a .php file is. I double click on it from Windows Explorer but nothing happens. I tried to "open with" html, but nothing happens. I downloaded the file to my MSI Wind Netbook thru a wireless connection to a DLink router.