More about this extension is a Silverlight operating system (sometimes called a Web OS or a Webtop or a cloud computer). It brings the convenience and comfort you know from classical desktop applications into your browser. gives you a familiar work interface that looks the same whether you’re working at your home computer, or remotely from a borrowed or public computer. System hosts all of your data and applications on the web so that they are accessible from Internet browser and not tied down locally to any one. You can launch applications right away without installation and it will be executed in draggable and resizable windows. is web-based and requires Silverlight 3 to operate. Application runs in Silverlight’s security sandbox. By default code is restricted from accessing your file system or doing anything that could hurt your machine. Besides desktop, taskbar, start menu and sidebar, currently it includes such applications:

* File Explorer
* Internet Explorer
* Video Player
* Rich text editor
* RSS reader
* Notepad
* Paint
* Twitter client
* Flickr viewer
* Youtube viewer
* Virtual Earth
* Chat
* Calculator
* Games like Chess, Solitaire, Spider etc.

The system supports installing external software.  But this program should be developed in Silverlight and be available in Internet or local file system.

Change Log:

It was added rss feed.

Older Versions

  1. Version 1.0.0
    Compatible With
    Stable Builds

    SilveOS - Silverlight operating system. It is is a website that simulates an operating system inside your web browser.

    Change Log:



  1. Angel says:

    If using browser anyway is easy to use actual sites, also seems to not install programs

  2. What possible use does this application have? Cloud management is still more comfortably and easily done with google docs ect. It doesn’t make anything easier to use. Why would I play solitaire or watch you-tube in a manor that maxes out my processor, when I have an actual os that does the same things efficiently? Infact you can make the assumption right now, that anyone who is looking at silver-light os, already has access to more efficient faster and easier to use applications, simply by dint that silver light requires a browser (which requires an os).

    Seriously, what an amazing waste of time and effort. It like you made the worlds slowest most inefficient car, and produced it in such a way, that is can only be driven if its towed by a faster efficient car. There by slowing down the efficient car and while limiting the roads in can go down.

    I am at a total loss to express how much a chindogu this really is.

  3. Chris says:

    I agree with Isaac. This is pointless. Literally, I can’t identify any problem that this solves. It’s an OS running in a browser. It doesn’t do anything to streamline the browser/OS experience.

  4. Outslider says:

    The best thing is, that SilveOS requires SilverLight that doesn;t support Chrome…

  5. Lucifer says:

    wow… this is a pile of shit…

  6. Emil Georgiev says:

    Absolutely agree with Isaac. It would actually be something useful if the icons were my bookmarks and it opened them in new tabs in my chrome instead of the slow, constantly crashing thing that looks like a browser(kind of). I mean this thing could really be something useful with the clock, and all that things on the right side and my bookmarks as icons on the left side. Plus all the customization options it has, it would be really cool. anyway now it’s more of a demonstration of what can silverlight do, than anything anyone can possibly use for something.

  7. Josh says:

    Isaac, Microsoft ultimately wants this to be the delivery method for future OS releases. What you are experiencing with Silverlight OS is the beginnings of an inevitable move away from hard copy OSes. The advantages to this migration are pretty obvious. No more OS pirating and, ultimately, no more software pirating in most cases.

  8. Bob says:

    But such an OS would require a browser.. Which requires an OS. This is useless. Microsoft is creating things that are useless.

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