Having a problem with the Transform Tool

I am able to select my layer with the Transform Tool, so that a box with 8 perimeter dots appears around the entire layer image, and I can adjust the parameters using the settings in the window on the right of the screen, however I cannot simply use the mouse to adjust by clicking on and dragging the dots on the Transform box.

I hope this makes sense. Can anyone help me with this?

What is the graphics card on your computer? Sometimes not having a graphics card that meets the system requirements can prohibit picking the transform tool.

If your graphics card does meet the system requirements, then make sure that you update the driver.