Have you tried to find this folder via the Windows explorer? Can it been seen? Maybe the folder is hidden (by default install - it is hidden by the Windows operating system in the users folder). Just check that you can view hidden folders in Windows explorer (by the settings in the windows control panel > appearance and personalization > folder options > show hidden files and folders.
This happened to me as the Windows OS could not find the SDK folder which was required for the Android Studio SDK path, and was resolved by showing hidden files and folders, which enabled me to complete the default SDK install path location.