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    Have a look at this article:
    <a class="moz-txt-link-freetext" href="http://www.qgis.nl/2014/04/22/qgis-in-de-klas-onder-windows/?lang=en">http://www.qgis.nl/2014/04/22/qgis-in-de-klas-onder-windows/?lang=en</a><br>
    <br>
    It describes how to use the --configpath qualifier to change the
    location of initialisation parameters from the registry to a
    specific directory and the location of plugins. <br>
    <br>
    In short:<br>
    <ol>
      <li>Make a standard installation of the new qgis<br>
        <br>
      </li>
      <li>Make a directory alongside the "bin", "apps" and so on in the
        c:\"program files"\"qgis wien" directory. Call it "inidir"<br>
        <br>
      </li>
      <li>Edit the c:\"program files"\"qgis wien" \bin\qgis.bat to use
        the --configpath parameter like this:<span style="color: rgb(68,
          68, 68); font-family: Consolas, Monaco, 'Lucida Console',
          monospace; font-size: 12px; font-style: normal; font-variant:
          normal; font-weight: normal; letter-spacing: normal;
          line-height: 24px; orphans: auto; text-align: start;
          text-indent: 0px; text-transform: none; white-space: normal;
          widows: auto; word-spacing: 0px; -webkit-text-stroke-width:
          0px; display: inline !important; float: none;
          background-color: rgb(255, 255, 255);"><b><i><span
                style="color: rgb(0, 0, 0); font-family: Verdana, Arial,
                Helvetica, sans-serif; font-size: 11.1999998092651px;
                font-style: normal; font-variant: normal;
                letter-spacing: normal; line-height: 15.6800003051758px;
                orphans: auto; text-align: start; text-indent: 0px;
                text-transform: none; white-space: normal; widows: auto;
                word-spacing: 0px; -webkit-text-stroke-width: 0px;
                background-color: rgb(255, 255, 255);"><br>
                <i><br>
                </i></span></i></b><i><span style="color: rgb(0, 0, 0);
              font-family: Verdana, Arial, Helvetica, sans-serif;
              font-size: 11.1999998092651px; font-style: normal;
              font-variant: normal; letter-spacing: normal; line-height:
              15.6800003051758px; orphans: auto; text-align: start;
              text-indent: 0px; text-transform: none; white-space:
              normal; widows: auto; word-spacing: 0px;
              -webkit-text-stroke-width: 0px; background-color: rgb(255,
              255, 255);"><i>start "QGIS" /B
                "%OSGEO4W_ROOT%"\bin\qgis-bin.exe</i></span></i><b><i><span
                style="color: rgb(0, 0, 0); font-family: Verdana, Arial,
                Helvetica, sans-serif; font-size: 11.1999998092651px;
                font-style: normal; font-variant: normal;
                letter-spacing: normal; line-height: 15.6800003051758px;
                orphans: auto; text-align: start; text-indent: 0px;
                text-transform: none; white-space: normal; widows: auto;
                word-spacing: 0px; -webkit-text-stroke-width: 0px;
                background-color: rgb(255, 255, 255);"><i> --configpath
                  %~dp0..\inidir </i></span></i></b><i><span
              style="color: rgb(0, 0, 0); font-family: Verdana, Arial,
              Helvetica, sans-serif; font-size: 11.1999998092651px;
              font-style: normal; font-variant: normal; letter-spacing:
              normal; line-height: 15.6800003051758px; orphans: auto;
              text-align: start; text-indent: 0px; text-transform: none;
              white-space: normal; widows: auto; word-spacing: 0px;
              -webkit-text-stroke-width: 0px; background-color: rgb(255,
              255, 255);"><i>%*</i></span></i><b><big><big><big><span
                    style="color: rgb(0, 0, 0); font-family: Verdana,
                    Arial, Helvetica, sans-serif; font-size:
                    11.1999998092651px; font-style: normal;
                    font-variant: normal; letter-spacing: normal;
                    line-height: 15.6800003051758px; orphans: auto;
                    text-align: start; text-indent: 0px; text-transform:
                    none; white-space: normal; widows: auto;
                    word-spacing: 0px; -webkit-text-stroke-width: 0px;
                    background-color: rgb(255, 255, 255);"></span></big></big></big></b><big><big><big><span
                  style="color: rgb(0, 0, 0); font-family: Verdana,
                  Arial, Helvetica, sans-serif; font-size:
                  11.1999998092651px; font-style: normal; font-variant:
                  normal; letter-spacing: normal; line-height:
                  15.6800003051758px; orphans: auto; text-align: start;
                  text-indent: 0px; text-transform: none; white-space:
                  normal; widows: auto; word-spacing: 0px;
                  -webkit-text-stroke-width: 0px; background-color:
                  rgb(255, 255, 255);"><br>
                  <big><br>
                    (Second last line in the bat file)</big></span></big></big></big><b><i><span
                style="color: rgb(0, 0, 0); font-family: Verdana, Arial,
                Helvetica, sans-serif; font-size: 11.1999998092651px;
                font-style: normal; font-variant: normal;
                letter-spacing: normal; line-height: 15.6800003051758px;
                orphans: auto; text-align: start; text-indent: 0px;
                text-transform: none; white-space: normal; widows: auto;
                word-spacing: 0px; -webkit-text-stroke-width: 0px;
                background-color: rgb(255, 255, 255);"><br>
                <br>
              </span></i></b></span></li>
      <li><span style="color: rgb(68, 68, 68); font-family: Consolas,
          Monaco, 'Lucida Console', monospace; font-size: 12px;
          font-style: normal; font-variant: normal; font-weight: normal;
          letter-spacing: normal; line-height: 24px; orphans: auto;
          text-align: start; text-indent: 0px; text-transform: none;
          white-space: normal; widows: auto; word-spacing: 0px;
          -webkit-text-stroke-width: 0px; display: inline !important;
          float: none; background-color: rgb(255, 255, 255);"><span
            style="color: rgb(0, 0, 0); font-family: Verdana, Arial,
            Helvetica, sans-serif; font-size: 11.1999998092651px;
            font-style: normal; font-variant: normal; letter-spacing:
            normal; line-height: 15.6800003051758px; orphans: auto;
            text-align: start; text-indent: 0px; text-transform: none;
            white-space: normal; widows: auto; word-spacing: 0px;
            -webkit-text-stroke-width: 0px; background-color: rgb(255,
            255, 255);"><big>Save the edited qgis.bat as qgis2.bat in
              same directory as qgis.bat<br>
              <br>
            </big></span></span></li>
      <li><span style="color: rgb(68, 68, 68); font-family: Consolas,
          Monaco, 'Lucida Console', monospace; font-size: 12px;
          font-style: normal; font-variant: normal; font-weight: normal;
          letter-spacing: normal; line-height: 24px; orphans: auto;
          text-align: start; text-indent: 0px; text-transform: none;
          white-space: normal; widows: auto; word-spacing: 0px;
          -webkit-text-stroke-width: 0px; display: inline !important;
          float: none; background-color: rgb(255, 255, 255);"><span
            style="color: rgb(0, 0, 0); font-family: Verdana, Arial,
            Helvetica, sans-serif; font-size: 11.1999998092651px;
            font-style: normal; font-variant: normal; letter-spacing:
            normal; line-height: 15.6800003051758px; orphans: auto;
            text-align: start; text-indent: 0px; text-transform: none;
            white-space: normal; widows: auto; word-spacing: 0px;
            -webkit-text-stroke-width: 0px; background-color: rgb(255,
            255, 255);"><big>Start QGIS by doubleclicking on the
              qgis2.bat file. First time around QGIS wil blow up. Next
              time it will run fine.<br>
            </big></span></span></li>
    </ol>
    You can then "install" the new QGIS by copying the  edited "QGIS
    wien" directory from the original pc to the root of the c-drive on a
    new pc,  make a short-cut to qgis2.bat and place it on the desktop<br>
    <br>
    I can't help you with the deinstall of the old qgis.<br>
    <br>
    Regards<br>
    Bo Victor Thomsen<br>
    AestasGIS<br>
    Denmark<br>
    <br>
    <br>
    <div class="moz-cite-prefix">Den 11-03-2015 kl. 11:34 skrev
      <a class="moz-txt-link-abbreviated" href="mailto:aleksei.popoff@asconit.com">aleksei.popoff@asconit.com</a>:<br>
    </div>
    <blockquote cite="mid:00ab01d05be6$f9c86550$ed592ff0$@asconit.com"
      type="cite">
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      <div class="WordSection1">
        <p class="MsoNormal">Hello,<o:p></o:p></p>
        <p class="MsoNormal"><o:p> </o:p></p>
        <p class="MsoNormal"><span lang="EN-US">I have 50 users with
            Qgis standalone from 1.8 to 2.6 –  Windows XP to 7 - 32 / 64
            bits versions.<o:p></o:p></span></p>
        <p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
        <p class="MsoNormal"><span lang="EN-US">Tomorrow, I need to
            install for those 50 users + 50 new users the latest
            version.  They don’t have the rights for install or
            uninstall the standalone version of Qgis.<o:p></o:p></span></p>
        <p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
        <p class="MsoNormal"><span lang="EN-US">My first idea was for
            looking for the .MSI installer but  <a
              moz-do-not-send="true" href="http://www.qgis.org">www.qgis.org</a>
            doesn’t have it. I didn’t view in the mailinglist anything
            related.<o:p></o:p></span></p>
        <p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
        <p class="MsoNormal"><span lang="EN-US">I know I can use the
            standalone with the argument /S but it’s not as clean as a
            MSI.<o:p></o:p></span></p>
        <p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
        <p class="MsoNormal"><span lang="EN-US">Can you describe the
            best way to uninstall / install the latest version / and
            upgrade easily ?<o:p></o:p></span></p>
        <p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
        <p class="MsoNormal"><span lang="EN-US">Should I use OSGEO with
            batch files ? How ? <o:p></o:p></span></p>
        <p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
        <p class="MsoNormal"><span lang="EN-US">Thanks in advance </span><span
            style="font-family:Wingdings" lang="EN-US">J</span><span
            lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
        <p class="MsoNormal"><span lang="EN-US">Best regards,<o:p></o:p></span></p>
        <p class="MsoNormal"><span
            style="color:#1F497D;mso-fareast-language:FR" lang="EN-US"><o:p> </o:p></span></p>
        <p class="MsoNormal"><b><span
style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:#333399;mso-fareast-language:FR">Alekseï
              POPOFF</span></b><span
style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:#333399;mso-fareast-language:FR"><br>
            Responsable informatique</span><span
            style="font-size:12.0pt;font-family:"Times New
            Roman","serif";color:navy;mso-fareast-language:FR"><br>
            <a moz-do-not-send="true"
              href="mailto:aleksei.popoff@asconit.com"><span
                style="color:#0563C1">aleksei.popoff@asconit.com</span></a><br>
          </span><span
style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:#333399;mso-fareast-language:FR"><br>
            <b>ASCONIT Consultants </b><br>
            Parc Scientifique Tony Garnier<br>
            6-8 espace Henry Vallée<br>
            69366 LYON Cedex 07<br>
            FRANCE<br>
            Tel : +33 (0)4 72 82 35 55     Fax  : +33 (0)4 78 94 11 98<br>
            Web : <a moz-do-not-send="true"
              href="blocked::blocked::http://www.asconit.com/"
              target="_blank"
title="blocked::blocked::blocked::http://www.asconit.com/blocked::http://www.asconit.com/http://www.asconit.com/"><span
                style="font-family:"Times New
                Roman","serif";color:#333399">www.asconit.com</span></a><br>
            <br>
          </span><span
style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:#993366;mso-fareast-language:FR">ASCONIT
            Consultants est membre de EA-Pôle de l'eau <a
              moz-do-not-send="true"
              href="blocked::blocked::http://www.ea-pole-eau.com/"
title="blocked::blocked::blocked::http://www.ea-pole-eau.com/blocked::http://www.ea-pole-eau.com/http://www.ea-pole-eau.com/"><span
                style="font-family:"Times New
                Roman","serif";color:#993366">www.ea-pole-eau.com</span></a></span><span
style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:#333399;mso-fareast-language:FR"><br>
            ______________________________________<br>
            Des consultants au service de la gestion durable des
            ressources et de l’Environnement<br>
            Les Systèmes et technologies de l’information au service de
            nos métiers</span><span
            style="color:navy;mso-fareast-language:FR"><o:p></o:p></span></p>
        <p class="MsoNormal"><o:p> </o:p></p>
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      <pre wrap="">_______________________________________________
Qgis-developer mailing list
<a class="moz-txt-link-abbreviated" href="mailto:Qgis-developer@lists.osgeo.org">Qgis-developer@lists.osgeo.org</a>
<a class="moz-txt-link-freetext" href="http://lists.osgeo.org/mailman/listinfo/qgis-developer">http://lists.osgeo.org/mailman/listinfo/qgis-developer</a></pre>
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