I am using Windows7 SP2 and I am unable to install opera 20 or any other previous version due to this message - 'The application was unable to start correctly (0xc00000a5). Click to close the application'. I have been using opera for years and loaded the new versions as they came along, but since trying to download 20, it has all gone wrong. I cannot find out what 0xc00000a5 is.