anki desktop cant opening

i have already installed anki on my PC but when i try to open it. there is a problem. it brings a small window that says “No error messages generated. FormatMessageW: The parameter is incorrect.” and when i press “OK” another window comes saying, "Error loading python DLL ‘C:\Program Files\Anki\ python.dll’.LoadLibrary: PyInstaller: FormatMessageW failed. "
My PC is windows 7

Please see