QBasic was a Basic interpreter bundled with MS DOS (and probably Win95), it is 16-bit text-only application, and there is no new version for last twenty years or so. It will not work on 64-bit system. Microsoft does not offer it for download, so only legitimate source would be old MS-DOS floppies.
Well I can run QBASIC on my old 32 bit system with downscaling the resolution to get full screen size. Not sure if it natively runs on 64 bit. Here's a modified version which indeed runs on 64 bit: http://www.qb64.net/