Calibrating laptop screen

After using the windows built in one, color's seem much better. Do I have to adjust the color enhancement setting through the intel's graphics and media control panel also? I have the screen to turn off after 20 minutes, will I damage or shorten the led's lifespan or possibly burn them out by immediately waking it up after it turns off? I use 100% screen brightness during the day and 40% at night, does constantly switching it shorten the lifespan of the leds?

 

I can tell you most laptops LCDs were not designed for image editing and most cannot be calibrated. They do not have the color gamut range and when you view them at an angle or pivot them up and down, the brightness changes. You typically cannot trust what you see on a laptop screen. If you examine your images by the numbers in the channels, you will see that there has been some dramatic movement in your editing. Particularly the Blue chjannel which has been clipped and significantly darkened which explains your yellow cast. If that still looks neutral to you on your laptop screen, then you really need to get an external LCD display.

 

Any "calibration" done by looking at the screen is pointless. You need hardware, such as a Spyder3 to do this. And no, none of the to you available options can damage your screen.

Eh? No...
Most laptop LCDs have a narrow gamut, true. This makes them worse for editing, true. But you can still calibrate them using say a Spyder3. What you need to know is, that you will loose shadow and highlight detail.

In terms of seeing colour casts, seeing them is useless. Take a Vaio SZ, looks fine - calibrate, looks yellow. Use it, it looks fine, go back it looks blue. It hasn't got anything to do with clipping, but with how he human eye adapts to what it sees. The human eye can see a range of colour temperatures as white.
The only way to test it, is again to use hardware - with appropriate software. So if you have a Spyder3, in the Elite version you are able to determine where you "lose out", by comparing the colour space to what your screen covers of it.