Video Settings Won't Work

Hi,

I have new Sony CW laptop running Windows 7 (64-bit) with an Nvidia GeForce GT 230m graphics card.

The tiny problem I have is that I can't adjust the video settings (colour/contrast etc.) in any media player (Windows Media Player, Realplayer etc.) as I am used to being able to do.

I updated the Nvidia driver and downloaded the K-Lite codec pack (too complicated - didn't know which codecs to adjust) with no result. The Nvidia control panel settings are all set to 'use the video player's adjustment controls' and I have had no luck adjusting any of the options.

I have read posts talking about video overlay, but I cannot find any options for this in the control panel.

Any help would be greatly appreciated.

Thanks.