Fps drops in all games out of nowhere

[colorado47]

My fps drops significantly when I play games
At first when I got this laptop I can play games on high and it'll be smooth. I play games like DOTA 2, Starcraft 2, and other steam games. I have this laptop for about 2 months now but the problem started occurring about two week ago and I con't know why. Now i play everything on low but the fps still drops. the delay is very visible but the games are playable, not so much enjoyable when theres a delay in reaction.
Temperature is fine, Internet Connection is fine, No virus (trojans, malwares, etc), I have defragged it, i updated my Nvidia drivers but it still continues.
I have an ASUS Q550L, with Nvidia Geforce 745M and Intel Core i7.
What is the problem and how do i fix it?
Any suggestions will be appreciated

 

[xxisubzeroixx]

Have you checked for background processes?,. you might have a bunch of programs running in the background hogging your memory etc.

Bring up your task manager, Ctrl+Alt+Del and click on the "performance" tab.

Disable any startup programs you don't need enabled using msconfig - click start --> run and type msconfig, click the "startup" tab and disable any unwanted start applications.

Could be a number of other things such as your antivirus accessing your HDD, you will have to do some digging to get to the route cause.

 

[colorado47]

Thank you for replying so fast and I tried that, still persist. And i have windows 8.1 64 bit.
I have also tried changing the graphics card I use, still goes on

 

[xxisubzeroixx]

Maybe your CPU is holding you back, What are the specs of the CPU?, although its an i7 some of the notebook ones are only Dual core and have low clocks.

 

[colorado47]

Intel(R) Core(TM) i7-4500U CPU @ 1.80GHz (4 CPUs), ~2.4GHz

 

[Dani Geus]

what kind of PSU do you have and can you tell me the +V12 details on your PSU?