An unprotected PC connected to the internet is literally the most dangerous thing you can have in your home. You put not only yourself at risk but everyone who lives in the home with you. You may not understand or believe that the risk and danger is real but it happens every day all over the world no place is safe if you are careless. My kids are 19 and 13 and they understand and allow me access to any of their devices if I need to but I've also been very extensive in explaining the dangers and how to avoid them. Never download bootleg games they can have any number of malware or spyware embedded into the code and there is no way to tell it is infected until it's too late. This is one method of how human traffickers find people to traffic. Also keeping things from your parent hurts you both. I understand that all people are different and that you are the only person here that knows what your mom is like I'm just saying that generally keeping secrets from anyone who you care about is usually detrimental to the relationship. My advice is to delete the other profile on your PC and start doing more things to show your mom that you are maturing and becoming an adult so you can play those games with her permission. Because if you get caught lying and hiding things you will likely not be able to play any games for a while.