I can't return to the correct resolution on my laptop

[jonjo2471]

Hi guys the correct resolution is not listed, i right click desktop display settings but the size i need to restore my display screen to full size of the lcd screen is not listed hence i have a 2 inch black border on the right hand side and half inch at the bottom....can anyone help please......

 

[Kcircyrd]

What operating system?

 

[jonjo2471]

windows vista

windows vista.....