Silverlight 1.0 instead of 2.0 as optional Windows Update at Vista Business SP1 x64
I recently installed a Vista Business 64-bit SP1 at a client’s machine and after installing all critical updates using Windows Update (or Microsoft Update in fact, which can replace Windows Update [without the user noticing any difference] also checks other Microsoft products for updates, like MS Office and SQL Server).
At Microsoft Update (which is integrated at Vista into the Windows Update window available at the Control Panel), I noticed Silverlight 1.0 was available as an optional update, although Silverlight 2.0 had already been released. So I went to Silverlight website, installed Silverlight 2.0 (quite hard to notice the download button at the 2nd tab with all that content on their site btw) and indeed the Silverlight 1.0 optional update disappeared when I checked Microsoft Update again. I suppose (or I should better say hope) Silverlight 2.0 is totally backwards compatible and it replaces the ActiveX control of Silverlight 1.0.