My pc suddenly started lagging

Dev_8_

Prominent
May 22, 2017
4
0
510
In recent weeks I installed call of duty advanced warfare. The game started lagging even though it matched my pc specs. After installing that game my whole laptop has started lagging now I don't know what to do. Before advanced warfare I completed campaign in call of duty ghosts and it ran fine but now after advanced warfare that game also lags

My laptop specs
Corei7@2.60ghz
AMD R7 m360 2gb
Intel graphics 520 1gb
Directx 12