Hi guys.
I've having a lot of lag w/ my laptop (config as below). Usually I play games w/ best perf setting, suchas low resolution or texture, but the lag still there. I'm not sure if it's the graph card or the processor. I use AntiVir and Comodo (as Firewall). I dont have any problem using programs as SolidWorks.
The games I use to play are: Civi 5, NFS, ...

Any ideas?! Maybe change the grease (processor) or even dust... I got no ideas at all!!

Mainboard : Dell 0T808J
Chipset : Intel PM45
Processor : Intel Mobile Core 2 Duo P8600 @ 2400MHz
Physical Memory : 4096MB (2 x 2048 DDR2-SDRAM )
Video Card : NVIDIA GeForce 9300M GS (256 dedicated)
Hard Disk : Seagate ST9250424ASG ATA Device (250GB)
DVD-Rom Drive : Toshiba-Samsung DVD+-RW TS-L633C
DVD-Rom Drive : ELBY CLONEDRIVE
Monitor Type : MK822€154AT - 15 inches
Network Card : Realtek Semiconductor RTL8168/8111 PCIe Gigabit Ethernet Adapter
Network Card : Intel Wireless WiFi Link 5100
Operating System : Windows 7 Ultimate Professional Media Center 6.01.7600 (64-bit)
DirectX : Version 11.00
Windows Performance Index : 4.3 on 7.9