Vista:
string myComputerPath = Environment.GetFolderPath(Environment.SpecialFolder.MyComputer);
System.Diagnostics.Process.Start("explorer", myComputerPath);
Environment.SpecialFolder.MyComputer ", Process.Start(" explorer "," ") .
, GUID :
Process.Start("explorer.exe", "::{20d04fe0-3aea-1069-a2d8-08002b30309d}");