Conversely, much older software that hasn't been updated in years may run into errors while running on newer operating systems like Windows 10. Older versions of Windows often have trouble running modern software and thus rFactor may run into errors if you're running something like Windows XP. Does rFactor work on my version of Windows? rFactor is available to all software users as a free download for Windows. This download is licensed as freeware for the Windows (32-bit and 64-bit) operating system/platform with certain restrictions based on its EULA. One of the main points of this game/simulator is the high level of realism that users can expect to experience with this amazing racing game. Those improvements continue with the latest versions of rFactor 1.255 which follows the virtual career of F1 drivers. The genre of racing simulation has become a pretty saturated market in the gaming community over the past year and games which allow you to realisticly experience racing has seen many improvements.