Can i fix my gaming problem or just fix it for a time ? Acer aspire 5750G

Hello ! I am writing to you because I have a problem with my computer from a month and I can not solve it. I was writing to Nvidia and Microsoft but they could not help but they were pointing me to Acer but unfortunately I could not connect to them so I decided to you.The problem shows only on games (all) without programs, browsers or movies. It came a month ago when I was playing a game League of legends. All of a sudden, while I was playing the screen, it suddenly turn in green pixels that flashed across the screen until the screen frooze and I could not do anything the game  crash turns off and writes: Aplication have been blocked from acessing graphick hardware and sometime the laptop is turn off. After writing to Nvidia they told me I had to uninstall the display drivers I listened to them and the problem fixed for a week and I was playing games without a problem but a week later the problem came again. I chat again with Nvidia and they told me I had to give the laptop for a test because there may be a hardware deffect or the videocard is brooken but I did not believe much and I decided to ask microsoft where they asked me about my laptop model and saw in acer that it was not compatible with windows 10 and they advised me to write to acer and they would tell me if there are drivers for windwos 10 for this computer model but it turns out but that they only help the Americans .Im desperate i  cant udnerstand why this problem happen if its really because of  that  that my laptop its not compability with windows 10 why then the problem happens year later why ? Microsoft told me to change my windows but i dont want to if you know how to fix it  or  just fix for a week or month please help me i will be verry thankfull.Btw sorry for my english i know its bad.Whatever i look forward for yuor answer!