I tried to install Silverlight from the Microsoft site. The download is fine. I got Silverlight.exe (4.7MB).
However, when I try and run it, I get the message saying "file is corrupt" during the process of extracting Silverlight.7z to my c:\833xxx (looks like a temp folder).
I tried yesterday and rebooted my machine twice. I tried it again today with the same problem.
Not sure if it is related to an access permission issue or not (I just got this new PC).
My PC is Windows XP Professional.