[Components]
Name: "Component1"; Description: "Установка Visual C++ для Visual Studio 2010 x32"; Types: viborochnaya; Check: FrameworkIsNotInstalled1
Name: "Component2"; Description: "Установка Visual C++ для Visual Studio 2010 x64"; Types: viborochnaya; Check: IsWin64() and FrameworkIsNotInstalled2

[Run]
Filename: {app}\Redist\vcredist_x86.exe; StatusMsg: Установка Visual C++ для Visual Studio 2010 x32; Components: Component1; Flags: shellexec waituntilterminated; Parameters: "/Q";
Filename: {app}\Redist\vcredist_x64.exe; StatusMsg: Установка Visual C++ для Visual Studio 2010 x64; Components: Component2; Flags: shellexec waituntilterminated; Parameters: "/Q";

[code]

function FrameworkIsNotInstalled1: Boolean;
begin
  Result := not RegKeyExists(HKLM32,'SOFTWARE\Microsoft\VisualStudio\10.0\VC\VCRedist\x86\');
  begin
  if IsWin64 then
  Result := not RegKeyExists(HKLM,'SOFTWARE\Wow6432Node\Microsoft\VisualStudio\10.0\VC\VCRedist\x86\');
  end;
end;

function FrameworkIsNotInstalled2: Boolean;
 begin
 if IsWin64 then
  Result := not RegKeyExists(HKLM,'SOFTWARE\Wow6432Node\Microsoft\VisualStudio\10.0\VC\VCRedist\x64\');
end;