By AN Jay on August 5, 2009

Windows4all, An Online Virtual Operating System

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Windows4all is a Microsoft Silverlight based online virtual operating system. It is a website that simulates an operating system inside a web browser. replicates the desktop environment of a modern operating system. The user can launch applications right away without installation.


Are you assuming that above screen shot is showing my desktop. No, this is the Windows4all desktop view. At first glance, you will would not believe that it’s just virtual version of web based Windows. requires Silverlight 2 player to operate because it was developed on Microsoft Silverlight. 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
* Calculator
* Games like Chess, Solitaire, Spider, Tic-tac-toe

The system also supports installing program functionality. But this program should be developed in Silverlight and be available in Internet or local file system. This is the alpha version of but it’s still wonderful.

Update: Thank you Akmal Wardak for your point. After you commented here, we have figured out that Windows4all is not a Microsoft product and we have mistakenly Introduced it like this. We apologize to our community.

Old Title : Microsoft Rolled Out Web-Based Version Of Windows (For Free)  (Removed)

New Title :  Windows4all, An Online Virtual Operating System For Free

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This could s*ck with people using slow internet..

This is not from MSFT, it only uses silverlight technology.

Or for a silverlight free alternative you could use eyeos:

[...] SmashingApps AKPC_IDS += “7135,”; Virtualisering, Windows [...]

[...] en Smashing Apps Enlace | Windows4all Entradas relacionadasRecuperar Registro dañado que impide que se inicie [...]

[...] SmashingApps descubro Windows4all, una versión de Windows online creada con Silverlight, la alternativa a Flash [...]

Its clear that this thing is not developed by Microsoft. like can’t you just tell that from reading the name “windows4all”.

and then the last paragraph of the post is just copied from a read-me file, and says that it supports installing additional software. I couldn’t find out how.
worst of all is the title of this post.
i will rank this on top as one of those stories that says one thing in the title and is actually another thing. just to gain attention???

I was kind of alarmed that when I opened up the Internet Explorer icon then went to to test, I was already logged in under my normal login for google. I think I’ll change my password and never go back to that site just to be safe :P

Ummm…that page uses *GOOGLE* analytics.


just sayin’

mmm, seems like the confusing title has been replaced with one that makes sense.

Someone’s getting a cease and desist…

I still prefer eyeOS.

It can be hosted on your own servers and has great collections of apps.

it only uses silverlight technology

[...] Windows4all, An Online Virtual Operating System @ SmashingApps [...]

Your article is write very well, I like it very much ~
I wish you have a wonderful day!Thank you.

thank you for your share~~!

For me, the best operating system is Linux because it rarely hangs.-”

operating systems can either make or break your system that is why it is wise to choose a vey stable one..::

the best operating system is always Linux, after Linux it is Windows XP. Vista sucks*,”

there are many different operating systems but of course i would still prefer to use linux for stability .””

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