I have been using Windows 7 exclusively now for about a month.  I can say that I love it.  I did run accross an issue the other day that confused the hell out of me.

I was trying to download an updated version of the Free AVG software,  and my Graphics drivers.  I could see them downloading, but once complete this files would disappear.  After some research I found a similar issue that others had after upgrading or uninstalling AVG FREE. I never put the two together.

A few days before I tried to upgrade the version I had of AVG to the new 8.5 Version.  The Upgrade Failed and I lost the program all togeter.  So I just uninstalled it all and went about my business.  But AVG did not fully uninstall and it was apparently the cuase of the disappearing files.

I went in to the file folder for AVG and deleted all that was left.
I also went in to the registry with ‘Regedit’ and deleted all the registry entries the had AVG in them and pointed to the AVG file directory.
I was then able to download the Full AVG8.5 file from their site and run it.  It asked if I wanted to update, fix or uninstall the program.  I choose uninstall.  Then Rebooted.
I then ran the program again to install it.  Updated it and  AVG free 8.5 is working on my Windows 7 machine again.

I am able to downlaod files and use them agian.