I highly doubt it is anything router related, almost every router's default settings are just fine for online game play on a pc. Unless you made changes yourself then it is most likely either internet or pc related. There are a few things you can check based on what version of windows you are using. I would first check to see if you have gotten any recent DOT.NET Framework updates...In most cases you can un install dotnet framework 4.0 or higher and still be fine. I would also download and install microsoft security essentials then update it and reboot pc in safe mode and run a full scan, before the scan you want to edit the scan options for the deepest scan possible...must be run in safe mode. Some addware/malware can greatly affect internet connection.