No one crashed your server, but your computer, maybe you should check your windows errors before claiming someone crashed your server by uploading a script. If you were smarter you would know what happened, or possibly make a spawn trap until you got back, something of that sort, anyway, it could either be your computer, someone crashed your blockland by spamming, or any other thing could have happened. I wonder why he automatically thought someone uploaded a harmful "virus" script to his blockland.... coincidence, I think so.