All my source games are lagging in multiplayer help me

[Jesus Man]

it was never like this before can you please help me so i can enjoy my games smoothly

My Specs:
CPU: AMD APU A6-4400M 2.70 ghz.
GPU AMD Radeon HD 7520G
RAM: 4 GB
Operating System: Windows 7 Home Premium (64 bit)

 

[saloomi2012]

is it latency lag or fps lag?