I have Blender 2.73 and want to update to 2.75 but when I do it does not unzip correctly or completely, and it does not show up in my control panel where the installed programs show up. Also I want to install the Blend4web add-on but the install from file does not work. I really don't know about scripting and all that so I would need a detailed walkthrough if I was going to install it that way. Can anyone help me with these issues?
When you do the update the installer file it should be an .msi file. if the one you have is zipped, unzip the file in a temporary file location, and the double click the [filename].msi file. You should ensure that you install it in the same directory as previous installations, if you did not use the default for your previous or first install.
The addon, after it is unzipped should be a *.py file; you can find help on this installation at this location: Installing an addon