Static Flicker on ASUS X454LD

I'm new here, so apologies if I make mistakes regarding rules on what to post.

Edit: Added pictures and a video. These were taken before it got replaced. While applying the edit, I experienced one!

I bought an Asus X454LD last May 5 and it was working flawlessly on its first day. I immediately installed all necessary updates and remove unnecessary bundled software like Asus webstorage (I don't need it since I use a lot of cloud based storage already), Asus enhanced display (I think that's what's it's called, don't quite recall it), Mcafee, Asus live update, and a software that offers for a purchase of Office 2013.
Then I suddenly experienced some flickers with the display, there are no specific software or time that triggers this "flicker", it just happens. then I got a bit worried and went back to the Asus store 5 days after the purchase and got it immediately replaced with a new one (phew).
As I got home, I did all the things mentioned above, and it still occurred (twice, hours after the replacement). So my suspect now is a software that probably got uninstalled or an update that got installed since I haven't installed any program by the time I'm writing this.
Specs are:
i3-4030U
NVidia 820m
4gb memory
1tb hdd
Windows 8.1 64-bit SL


Pictures (normal behavior - Flicker)




Video: (0:20 - 0:25)

Thanks in advance! Will edit this if I happen to experience more abnormal behavior or won't experience the issue at all.