Try all of these
1. Do a DNS flush, Clicky here on how to do that
2. Clear your PC's temp files with Clean Master for PC
3. Open up your Task Manager by pressing Ctrl+Alt+Del on keyboard and see if there are some updating services running in the background processes , Example: Adobe IPC Broker service,or any form of updater service which updates softwares you use in the background. If you don't know if there are any running provide a screenshot and i will guide you further on.)
4. Do a Disk Cleanup of C: drive Clicky here on how to do that , P.S The top right corner where it says Windows 8.1/Windows RT 8.1 , Click drop down arrow and select your version of windows 7/8/10)
5. Disable any unwanted programs you don't want running and hogging internet. Clicky here on how to do that.
Id bet on my listed methods to have a ping reduction by a few ms.
If all else fails make a support ticket.