I recently bought a laptop which is the dell Vostro 3500. When I bought it, I saw in the device manager had 2 GPUs one is the integrated GPU and one is the dedicated GPU mx330. The problem is some heavy apps run on GPU 0 which is the igpu and it bothered me so i disabled the igpu in the device manager. Then I found lag when i move my app window etc. I went to advanced display settings and saw it says it is connected to Microsoft basic video adapter. I have windows 10 20h2 and video driver version 471.11 which I got from Nvidia website by filling correct details.