Today at school one of my teachers' computers started playing creepy piano music and he couldn't stop it, and now that i'm home mine played it for a minute and stopped.
I haven't got much from searching quantserve, but it seems like it's some kind of adware, but why is it coming up when I launch minecraft.exe? I've tried deleting and redownloading minecraft.exe, and it just comes up again.
I just bought it, and when I try to open it, it goes fullscreen black, and after a few seconds closes and windows says "A problem with the program caused it to close"