you want to clean your monitor with nothing but tap water (if clean enough) or distilled water, and a microfiber cloth.
you want to use the cinema/theatre/movie picture preset. before you select that, restore your monitor to factory default, and restore all settings changed in Windows related to monitor calibration.
after youve done that, you open the built in Windows calibration tool, by simply searching for it, and follow the on screen steps, which will guide you through the process. make sure to never change the picture preset while doing this, you only want to change contrast and brightness if necessary. do change the gamma if the test isnt perfect already. you can test this by moving the sliders a little bit.
before starting i advise you to take a photo of before and after, to see if you like the results. more often than not, majority of consumers cant stand the way accurate colors look. im saying that because once its accurate, youll in an instant, be distracted by all other displays you come across as displaying a blue tint over the whole image. thats partly because manufacturers ship displays in the standard picture mode, and with the standard color temperature. youll get used to it within a few days though. what calibrating does is brings out more details you couldnt see before, and if i have time later, i can show you a before and after of tomb raider on xbox one, which people probably wont believe are true photos.
All the best!