OBS
OBS
Sometimes things go wrong and throw errors, but most of the time they work well.
Have you set up the MS VC++ 2013 runtimes? You can find more details at the provided link. Most users may struggle to get it running if they missed the download. If it works, what are your current settings—bitrate, FPS, downscale options? Which game are you aiming to stream? A fast-paced shooter with lots of movement will need a higher bitrate due to the increased pixel count.