I recently bought an HP Pavillion notebook which has windows 7 home premium (64 bit) and came installed with .net 4. I need to install 3.5 for a software program and thought I had done that when I first got the computer. So I checked today and i have the.exe setup file, so tried the install. First, it seemed to work but then a message popped up that said it may not have installed correctly. There was an option to reinstall and troubleshoot, so i did that and it seemed to have worked. However, when I go into my programs, only .net 4 is there - still no .net 3.5. Any ideas or help would be greatly appreciated. Thanks.