Program running but not opening or showing in taskbar!

Hi! I have an issue that seems to happen only with one particular program and I can't figure out how to fix it. When I run it, nothing happens on screen. In the Task Manager it shows that it's running as a background process rather than an App which is how it usually displays, and I can still hear sounds from the program so it's definitely there... I just don't see it on my screen and there's no icon in the taskbar. It's not offscreen and I have fully updated my drivers and the program itself and rebooted my PC. I'm out of ideas! Any help much appreciated. Thanks.