Qosmio X505-Q8102X Problems

Hello

I just bought this qosmio x505-q8102x laptop used and I am having some issues with it. When I am on the laptop it will randomly lag. It does not matter what I am doing. I could be surfing the internet or playing a game or working in word. The computer will just freeze for a second to a few seconds and anything I did while it waqs frozen does not show up. Like if I was typing and it froze nothing I entered while it was frozen shows up. It also does not get the frame rates that I think it should in any game no matter what I have the graphics set to. Before I bought this laptop I looked it up online and I really did not find any red flags for this laptop. I have restored the laptop to the out of box state. The person I bought it from stated that toshiba replaced the motherboard about two months ago.

If anyone has any suggestions to try and fix this I would really appreciate it.

took it apart and everything looks . Ran memory tests on the ram and it checked out. Replaced hard drive and still having problem.

I have not tried it in safe mode. I will do that and let you know.

i tried it and it does it in safe mode

I don't believe that it is. What are you thinking could be the problem with the mainboard? I can send it back to toshiba and they could replace the mainboard again. It really isnt too costly less than $400 and the laptop is good enough to put the money in it. I just want to rule out everything else before I send it in to them and give them some of my money. You know what I mean?