Open the Intel Control Panel:
1- Go to Display -> Color -> Advanced. Set Color Gammut to Vivid Colors -> Apply
2- Back to the home screen, click on Video -> Set Everything to Application Settings -> Apply
3- Then go under Advanced. Set Total Color Correction to Disabled. -> Apply
4- Click on Video on top , and select Image Enhancement. Set Skin Tone Enhancement to Disable, and Sharpness to Application Settings.
Now click on Advances, set Contrast Enhancement to Disable, set Film Mode Detection to Disable, and Noise reduction to Application Settings -> Apply.
Almost done fixing Intel crap default settings
5- Click on Video on top again -> select: Gamut Mapping. Set Gamut Compression to Disabled -> Apply
6- Now back to the main screen, click on Power -> On Battery. Set Display Power Saving Technology to Disable -> Apply
Now if I didn't forget anything, your problem should be fixed.
I know flickering, I am sensitive to PWM driven LED backlight LCD display. That is also why I hate LED Christmas tree that are not high quality as I feel the light flickering at a high rate. Cheap panels uses PWM (Pulse width modulation) to control the backlight, good displays uses much more costly dimmer circuit, and requires much more costly LEDs that works with a dimmer circuit. I picked the Surface Pro 2 because it uses a dimmer circuit from 30% brightness and up, anything bellow is on PWM, however because it is low light, it doesn't affect me. So I am very happy.
You may be able to see it in action, by sliding smoothly and slowly the screen brightness up and down in Windows, at around 30% and bellow it should not look smooth transition of brightness as it is at higher brightness.