{"id":37494,"date":"2014-02-27T23:00:00","date_gmt":"2014-02-27T22:00:00","guid":{"rendered":"https:\/\/promocionalia.es\/web\/2014\/02\/27\/como-implementar-windows-steadystate-by-panos-macheras-en-windows-7\/"},"modified":"2024-05-07T18:24:27","modified_gmt":"2024-05-07T16:24:27","slug":"como-implementar-windows-steadystate-by-panos-macheras-en-windows-7","status":"publish","type":"post","link":"https:\/\/promocionalia.es\/web\/como-implementar-windows-steadystate-by-panos-macheras-en-windows-7\/","title":{"rendered":"Como implementar Windows SteadyState (by Panos Macheras) en Windows 7"},"content":{"rendered":"

 Windows Steady State fu\u00e9 un producto gratuito muy conocido que ven\u00eda con Windows XP usado por instituciones como bibliotecas, escuelas y cibercaf\u00e9s de internet para proteger sus ordenadores de virus y problemas. La funcionalidad de este programa era \u00abrestaurar\u00bb el sistema a un sistema anterior limpio, borrando modificaciones temporales realizadas por un usuario.<\/p>\n

Desafortunadamente, Windows Steady State desapareci\u00f3 en Diciembre de 2010, y no se implement\u00f3 para Windows 7. Esta ausencia ha sido recriminada por cientos de usuarios. En este art\u00edculo se ha trabajado para replicar el funcionamiento de Steady State para Windows 7.<\/p>\n

A continuaci\u00f3n el art\u00edculo original escrito en ingl\u00e9s por Bill Thies con tecnolog\u00eda desarrollada por Panos Macheras, ambos trabajadores de la propia empresa Microsoft:<\/p>\n

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Windows 7 Steady State<\/h1>\n

Bill Thies<\/a>
Researcher
Microsoft Research India
thies@microsoft.com<\/a><\/span> <\/p>\n

Core technology developed by:<\/i>
Panos Macheras
Infrastructure Consultant
Microsoft Greece
panosm@microsoft.com<\/a><\/span><\/p>\n

<\/center> <\/p>\n

Introduction<\/h2>\n

Windows Steady State<\/a> was a very popular product that was freely available with Windows XP. Steady State enabled institutions such as libraries, schools, and Internet cafes to protect their machines from corruption and viruses, even as many untrusted people used the machines throughout the day. Its core functionality was the ability \u00abrestore\u00bb the system to a prior clean state, thereby erasing temporary changes induced by a single user.<\/p>\n

Unfortunately, Windows Steady State was discontinued<\/a> in December 2010, and no comparable solution for Windows 7 has been announced as of yet. The absence of Steady State in Windows 7 has been decried by hundreds of users<\/strong><\/a> online.<\/p>\n

Our goal in this work is to replicate the core functionality of Steady State under Windows 7.<\/p>\n

Windows 7 Steady State<\/h2>\n

We have demonstrated how to achieve Steady State functionality in Windows 7, in a manner that is simultaneously simpler and more robust than Microsoft’s Steady State solution for Windows XP.<\/p>\n

Using our solution, the user has two choices every time they boot the computer:<\/p>\n

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  1. Windows 7:<\/strong> Boot the machine normally, saving all changes to the disk.<\/li>\n
  2. Steady State:<\/strong> Boot in steady state mode. All changes will be discarded upon the next shutdown or reboot.<\/li>\n<\/ol>\n

    The first option is intended only for administrators of the machine, enabling them to install software (such as MS Word) that should be accessible during all future sessions. The second option is intended for the daily operation of the cafe, in which any modifications made by visitors should be discarded upon shutdown. Besides this choice at startup, our solution is completely transparent to users.<\/span><\/p>\n

    Installation:<\/strong> Because our system modifies the boot menu, it does not install as a normal application. Instead, it installs along with the operating system itself. Panos Macheras has developed a script, detailed on his blog<\/a> and demonstrated below, which converts the normal Windows 7 installation media into a Windows 7 Steady State installer. We envision that administrators would run this script on their installation media to enable the steady state functionality, prior to installing the OS in their Internet cafe.<\/p>\n

    Technical details:<\/strong> Our solution leverages the Virtual Hard Disk<\/a> (VHD) abstraction, which was developed as part of Microsoft Virtual PC. Starting in Windows 7 (and Windows Server 2008 R2), the machine can be configured to boot<\/i> into a Virtual Hard Disk, providing complete isolation between alternate versions of the OS. In our system, we use two VHDs: one representing the permanent state of the machine, and one representing an incremental difference from that state. When booted into the permanent disk, all changes are saved. However, when booted into the temporary disk, all changes are discarded. This provides foolproof rollback-and-recovery functionality, immune from computer viruses.<\/p>\n

    Demos<\/h2>\n

    The following screencasts demonstrate the basic functionality of our Steady State solution. Please keep in mind that as an initial prototype, our system is still missing some important features, including password protection and an integrated installer. We expand on these issues below.<\/p>\n

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    Part 1: Basic Usage Scenario (5 minutes)<\/strong><\/p>\n

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    Part 2: Installation and Setup (9 minutes)<\/strong><\/p>\n

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    Future Work<\/h2>\n

    While this system demonstrates proof-of-concept for Windows 7 Steady State, some additional features are needed before this system is broadly deployed. We believe that the two highest-priority features are:<\/p>\n

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    1. Password-protection:<\/strong> To prevent ordinary users from making permanent changes to the machine, a password should be required to boot into the unprotected \u00abWindows 7\u00bb mode.<\/li>\n
    2. Simplified installer:<\/strong> Rather than following the steps detailed in the blog post<\/a>, administrators should be able to create a Windows 7 Steady State installer using a simple program.<\/li>\n<\/ol>\n

      Also, one limitation of the system is that it requires Windows Enterprise or Ultimate editions. We welcome feedback on the penetration of these editions amongst primary iCafe partners.<\/p>\n

      Summary<\/h2>\n

      We are extremely excited about the potential of this Steady State solution to improve the security and reliability of Internet cafes in the developing world. Our research suggests that this is addressing a felt need, and that users are also willing to pay for such functionality. Internet cafe owners could also be much more interested in using a genuine copy of Windows, if Steady State functionality is bundled therein. We are eager to initiate dialogue with product groups and the iCafe team to understand how we can make this vision a reality.<\/p>\n

       Fuente: http:\/\/research.microsoft.com\/en-us\/um\/people\/thies\/steady-state\/<\/a><\/a><\/p>\n

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      RESUMEN by Panos Macheras sobre COMO IMPLEMENTAR Windows 7 SteadyState de forma resumida y gr\u00e1fica:<\/strong><\/span><\/p>\n

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      Windows 7 SteadyState solution simplified!<\/h3>\n
      <\/span><\/div>\n
      \"Panoshttp:\/\/i1.social.s-msft.com\/profile\/u\/avatar.jpg?displayname=panos+macheras&size=large); background-size: cover; background-position: 50% 50%; background-repeat: no-repeat no-repeat;\u00bb><\/span>Panos Macheras<\/a> <\/span><\/span><\/div>\n
      7 Jul 2011 12:51 PM <\/span><\/div>\n
      \n