Many Great Features, but TOO MANY ERRORS

I bought this laptop and I used it for about 2 weeks. After two weeks of using it, it starts doing weird things. My mouse pointer started to glitching. It just moves around by itself going to one corner of the computer screen to the other corner. This was very frustrating, so I went to the Microsoft Store to get an exchange. After I used it for another few week,it started to do weird things again. This time, the mouse pad freezes and couldn't use it unless I restart the computer. So, I had to take it again to the Microsoft Store to get another exchange. After a week I got another exchange, I got an error that says, 'UNKNOWN AC POWER ADAPTER', at the start up screen. There was an ignore button, so I pressed it and it started scanning my computer for any errors and it kept popping up. This made SO frustrated that I didn't know what to do anymore. The features are AMAZING, but the problems are SO annoying.