At first scan your PC for viruses For example u can use this utility http://www.freedrweb.com/cureit/?lng=en After that install(update)the links below for (Windows7 x86) - .NET Framework http://www.microsoft.com/en-us/download/confirmation.aspx?id=40779 - C++ http://www.microsoft.com/en-us/download/details.aspx?id=5555 - DirectX http://www.microsoft.com/en-us/download/details.aspx?id=35