Looks like you found some relief from some background programs running. Good for you!
ASUS G74S, working properly, can still be used to lightly game. Certainly it can not handle the latest games but it still has life.
Get your laptop serviced, CPU & GPU repasted, fans serviced, upgrade your WiFi Board, install a new SATA SSD drive, and install a new battery. Your laptop could last a few more years.
Good Luck
G752VSK, G75VW-3D, G51J, G1S
Homebuilt Windows Server