More fun with detecting UAC. Reports in the field indicate that some computer...

base/win_util.cc

 // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/win_util.h"
 
 #include <sddl.h>
 
 #include "base/logging.h"
 #include "base/registry.h"
@@ skipping 310 matching lines @@
   }
   return std::wstring();  // error
 }
 
 bool UserAccountControlIsEnabled() {
   RegKey key(HKEY_LOCAL_MACHINE,
       L"SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Policies\\System");
   DWORD uac_enabled;
   if (!key.ReadValueDW(L"EnableLUA", &uac_enabled))
     return true;
-  return (uac_enabled == 1);
+  // Users can set the EnableLUA value to something arbitrary, like 2, which
+  // Vista will treat as UAC enabled, so we make sure it is not set to 0.
+  return (uac_enabled != 0);
 }
 
 }  // namespace win_util
 
 #ifdef _MSC_VER
 //
 // If the ASSERT below fails, please install Visual Studio 2005 Service Pack 1.
 //
 extern char VisualStudio2005ServicePack1Detection[10];
 COMPILE_ASSERT(sizeof(&VisualStudio2005ServicePack1Detection) == sizeof(void*),
                VS2005SP1Detect);
 //
 // Chrome requires at least Service Pack 1 for Visual Studio 2005.
 //
 #endif  // _MSC_VER
 
 #ifndef COPY_FILE_COPY_SYMLINK
 #error You must install the Windows 2008 or Vista Software Development Kit and \
 set it as your default include path to build this library. You can grab it by \
 searching for "download windows sdk 2008" in your favorite web search engine.  \
 Also make sure you register the SDK with Visual Studio, by selecting \
 "Integrate Windows SDK with Visual Studio 2005" from the Windows SDK \
 menu (see Start - All Programs - Microsoft Windows SDK - \
 Visual Studio Registration).
 #endif