Lenovo Y50-70 Terrible Lag

[Blood & Thunder]

So every time I play a game on this laptop, it lags, no matter what game it is.
Actually, it's not internet lag or fps lag, it's just that the fps counter gets to 5 fps for like 1 second from time to time. (lag spikes).
GTA 5 works at 40 fps on high settings, but every 30 seconds I get a lag spike.
The same goes for Trove, and even CLICKER HEROES!! (Yes, clicker heroes).
Path of Exile is completely unplayable, with lag spikes every 5 seconds. (but I don't know if it's because of my laptop because it was unplayable on my desktop PC too).
Is there any way to fix this? I installed Advanced System Care 8 but it's the same.

[Blood & Thunder]

Windows 8.1 Pro 64 bit
GeForce GTX 960M
Intel® Core™ i7-4720HQ Processor (6M Cache, up to 3.60 GHz)
8GB Ram
1TB Disk Space

[💕 Mei 💕]

Drivers up-to-date? Playing plugged in?
I used to run Skyrim in low at 40 FPS in a 880M until I updated my drivers and now I have smooth 60 FPS in ultra. Also, plugged in while playing games is a must, or you will get random FPS spikes aswell.

[Blood & Thunder]

Yes to both questions.

[Seven7]

ASC have known problems with Steam and games

Samsung, Lenovo and some others laptops, that use switheable graphics, radeon video, WiFi\WiMAX\Bluetooth on Broadcom and dual WiFi\WiMAX Intel chipsets currently incompatible with W10
it can't upgrade (solution - remove wifi card when update) or have lags after update (solution - reinstall driver or remove WiFi card and use Ethernet or USB adapter WiFi

[Blood & Thunder]

But I have Windows 8.1...