My brother was messing with MyBB, and when he unzipped the file to download it these pictures from MyBB forums kept on popping up. The only way I could get rid of them and to stop from popping up every two seconds was to shut down my computer the improper way. Can anybody explain to me what happened and how I can get this to work because my brother won't leave me alone! :|

Since mybb doesnt have any programming that runs on the client computer, its impossible that its mybb thats causing this. You should scan for trojans, viruses, ect...Maybe it was even a computer glitch or buggy software