TCP OPTIMIZER 4.0.6.0 FREE 

Windows XP, 7, 8, 8.1, 10, 2012 Server, etc

Details: The TCP Optimizer is a free, easy Windows program that provides an intuitive interface for tuning and optimizing your Internet connection. There is no installation required, just download and run as administrator. 
Select slider control 100Mbps, press Optinal and Apply changes, restart PC OK !!!
P.S: ENJOY