I don't know the name of the graphics card. When I go to control panel,device manager it just says standard vga graphics adapter, but further the list I have a yellow box with an exclamation mark in it beside video controller. When I try to update driver it says windows was unable to install video controller. When I go to the properties it says code 28 click to update.
You need the Vaio Driver downloads, but all I can find are these. No details of what's included, suggest you download them all as they are relevant to your model and hope there's an updated GPU driver amongst them.http://www.sony.co.uk/support/en/product/VGN-FS115B/updates
Did you upgrade to 7 Ultimate or use the Restore facility on your HDD?