syswow64\rundll32.exe excess internet traffic

Hi,

Last week I noticed many detections in Avast! virus scan. I removed all suspect problems (log included). Over the following week I noticed a huge increase in internet traffic. I have secured my router/wireless, and have reason to believe it is something to do with my PC. I installed GlassWire firewall to monitor individual apps/processes and have reason to suspect that c:\windows\syswow64\rundll32.exe is infected. It consistently chews up data, and cannot reason this.

I have run...

syswow64\rundll32.exe excess internet traffic