Why never get fixed Win2008 R2 X64 IE lauch issue

Trouble shooting for several days, with reflector I found the real cause.

The problem is under Environment:
Windows Server 2008 R2 x64, IE 9, IE10 and IE12, and every version of Testing framework from 2012.2 to lastest.
IE would not launch, always prompting could not find file. I tried ways from every posts which is similar but get no way.

Then I had to use reflector and found the following code never works in my environment:

ProcessStartInfo startInfo = new ProcessStartInfo {
            Arguments = ((MajorVersion >= 8) ? "-nomerge " : string.Empty) + "about:blank",
            Verb = "open",
            WindowStyle = windowStyle,
            ErrorDialog = false,
            FileName = "iexplore.exe"
        };
        Process process = Process.Start(startInfo);

which resides in LaunchNewBrowserInstance(int timeout, ProcessWindowStyle windowStyle, string pipename), the above code always throwing exception.
System.ComponentModel.Win32Exception (0x80004005): 系统找不到指定的文件(System could not find specified file)。
   在 System.Diagnostics.Process.StartWithShellExecuteEx(ProcessStartInfo startI
nfo)
   在 System.Diagnostics.Process.Start(ProcessStartInfo startInfo)

The correct way is using :

Process.Start(Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.ProgramFiles), @"Internet Explorer\iexplore.exe"));
and
Process.Start(Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.ProgramFilesX86), @"Internet Explorer\iexplore.exe"));

for replacement.

Could you guys fix this for this environment, thanks a lot. It confused me for quite a long time.

Thanks!