Thank you for your reply. No, issue is not lag. The issue is with 6 games he has purchased and plays in Steam. When he starts up the game, it only goes so far, and then freezes his pc.
I have tried a memtest and a video card test, ones suggested to me by the pc maker, and both mem and video card pass with flying colors.
My son has chatted with other users, and done a bit of Googling, and has read that the motherboard could be at fault too.
So I am hoping that with Aida, I can have it test everything to the max, and then give me a report as to what has passed and what has failed. If the pc has no hardware issues, I can then go to Steam and get then to find what is at fault, and if the pc fails then go to pc maker and have then change the parts since it is still under warranty.
So what do I chose in Aida so it can test everything?