HackShield Initialization Error 0x00000000(0)
Another copy of Maplestory is already running. Please close all instances and try launching again."
Okay. So I just got back into MS after not playing for probably over a year. I had to redownload the client etc etc because it was so out of date and when I first tried to launch I got this error. Per suggestions given in the very few other people who I have seen with this problem, I reinstalled. Restarted my laptop. Reinstalled with my firewall disabled. Tried to launch with firewall disabled. Six hours later, still I had no progress. Just this same error over and over again. And before you ask, yes, I checked my task manager under processes to make sure there was no MS, hackshield, or blackcipher processes running. I have tried to launch via the website as well as with Steam.
So then I figured out that my school internet must have been blocking part of the game. I drove to my local Subway and tried to launch it there on their wifi and huzzah! it worked. This was Saturday, just a few days ago. When I drove back to school I logged a ticket with my school's IT department (I've already logged one with Nexon) and tried again and it worked! And it worked until today at 1:05, roughly. I had just quit the game because I had class, but decided I had time to write down what I had gotten from gach so that I could P/c it later. And the error came back.
tl;dr--I'm getting this error for inexplicable reasons and I've tried everything suggested to fix it; it worked for a little while and now it doesn't again. Anyone have a solution? I use Norton Antivirus, btw.