What display drivers does Dell have available for the Inspiron? Is that one of the dual GPU machines?
Usually one can't go directly to the web site of the maker of the GPU (e.g., AMD or Intel) with a laptop.
An easy way to provide a summary of the computing environment Photoshop sees is to go into Help - System Info, copy the data, and post it here. It's possible someone here may be able to spot a problem by looking that over.
-Noel