Software

Is the appearance of your screen not very clear?
If not clear, it is a hardware limitation. If clear, just play with display properties which is controlled by your window (control panel) and not excel.

I don't know about the standard heavy border, but under Tools/Options/View there is a section for Windows options and Gridlines, allowing gridlines to be included and the colour of the gridlines.

let us know how u get on

cheers