Error Code 90000 Every Hour

[Suikoden]

I'm on Famfrit, but I'm only getting this error on one PC. The other PC (non-gaming PC that can barely run this game) and PS3 do not get error 90k. The only discernible difference that I can see is that the PC with problems with this game has a Realtek network adapter while the one that doesn't have the 90k problem has an Nvidia network adapter. I've tried everything else.

I had no issues till this morning. I tried making a new character on the server too, but same error; but I can go on any other world.
This is not making any sense unless it's an area problem on the server.