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POSilent Dropbox removal
 

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    <p>I use the following script in <a href="http://code.google.com/p/windows-package-manager/" rel="nofollow">Npackd</a> to uninstall Dropbox. It works on XP and Vista, but fails on Windows 7/64. Instead of showing the taskbar (the one that is normally at the bottom of the screen) it shows a Windows Explorer window with the content of C:/. This is not Dropbox related as removing other packages with DLL based shell extensions also shows the same effect.</p> <pre><code>Uninstall.exe /S _?=%CD% taskkill /f /fi "IMAGENAME eq explorer.exe" del DropboxExt.13.dll del DropboxExt64.13.dll rem start explorer from the root directory so it does not lock this one start "" /D\ explorer.exe </code></pre> <p>What is wrong with the script? How can it be modified to work correctly on Windows 7 too?</p> <p>Thanks</p> <p>EDIT: I am really tired of this problem. The following batch file works either started as a normal user or "As Administrator":</p> <pre><code>taskkill /f /fi "IMAGENAME eq explorer.exe" ping -n 5 127.0.0.1 pushd \ rem runas /trustlevel:0x20000 start "" /D\ explorer.exe popd </code></pre> <p>Here is the code that starts the .bat from my program (path="Uninstall.bat", only 2 new environment variables are defined):</p> <pre><code>QDir d = this-&gt;getDirectory(); QProcess p(0); p.setProcessChannelMode(QProcess::MergedChannels); QStringList params; p.setWorkingDirectory(d.absolutePath()); QString exe = d.absolutePath() + "\\" + path; for (int i = 0; i &lt; env.count(); i += 2) { p.processEnvironment().insert(env.at(i), env.at(i + 1)); } p.start(exe, params); </code></pre> <p>The corresponding code in Qt/qprocess_win.cpp:</p> <pre><code>DWORD dwCreationFlags = CREATE_NO_WINDOW; dwCreationFlags |= CREATE_UNICODE_ENVIRONMENT; STARTUPINFOW startupInfo = { sizeof( STARTUPINFO ), 0, 0, 0, (ulong)CW_USEDEFAULT, (ulong)CW_USEDEFAULT, (ulong)CW_USEDEFAULT, (ulong)CW_USEDEFAULT, 0, 0, 0, STARTF_USESTDHANDLES, 0, 0, 0, stdinChannel.pipe[0], stdoutChannel.pipe[1], stderrChannel.pipe[1] }; success = CreateProcess(0, (wchar_t*)args.utf16(), 0, 0, TRUE, dwCreationFlags, environment.isEmpty() ? 0 : envlist.data(), workingDirectory.isEmpty() ? 0 : (wchar_t*)QDir::toNativeSeparators(workingDirectory).utf16(), &amp;startupInfo, pid); </code></pre> <p>Why does the Explorer think there is already a taskbar?</p> <p>EDIT2: I know what is wrong now. After the Explorer is killed a new is automatically started by an svchost.exe process with the following parameters: /factory,{682159d9-c321-47ca-b3f1-30e36b2ec8b9}. The GUID is for DesktopExplorerFactory. This is probably a crash-protection for a COM service. My calls to explorer.exe do not start a new Explorer as there is already one. After a minute or two this process will be automatically closed if no windows are opened. So I think Ben Voigt is right and "There's really no good way to unload the shell completely without logging off all users."</p>
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