Something manufacturer- or device-specific, probably accessible through Control Panel -> Mouse or something similar, as noted in other answers. Start Menu -> Settings -> Mouse & touchpad -> Reverse scrolling direction So i dont really believe them, its a water damage because i didnt spill any water on it) And if you have any suggestions what else could be the problem, i would be glad if you shared them with me.In Windows 10, if you have a touchpad, you will probably have one of the options mentioned in the other answers:

PLEASE help me, or tell me if its really neccessary to remove and change the WHOLE motherboard or if its reasonable to pay that price for this repair.(I live in Czech Republic, where those repair guys would tell me anything to get money. When i do left click, it actually does right click. Also, i tried to connect my magic mouse to it and it does the same thing. I would not say a word if the computer was dead or had some other main damage, but i think its ridiculous to pay 1000€(i can buy brand new macbook air for this price) just to pay for the keyboard/trackpad repair. They want to change the whole motherboard, in order to fix this one little piece of it. Aparently, they want me to pay 1000€(1300dollars) so they can fix it. The only part showing some damage is a little place, right where the mag safe connector connects to the laptop.

I took it to my local Apple Service Provider, and they diagnosed it as water damage(altough there is no possibility i spilled water on it/somebody spilled water on it). It feels like the laptop is completely okay, just the keyboard and trackpad are not working. But EVERYTHING else was/is working like a charm.

Also, when i left clicked the trackpad, it behaved like when i do right click(the window with i.e.

I shut it down, went to bed and then i woke up in the morning, turned on my laptop and all of the sudden, the keyboard didnt work. My macbook air was completely alright when i was using it in the evening.

How to fix inverted logitech mouse mac