I have a brand new Sony Vaio i5 running Windows 7. While installing i-tunes the display seems to have fine white lines running vertically down the screen making it very difficult to see anything. I have connected to a 2nd external monitor and all is perfect - just the laptop's LCD panel is still affected. I have tried looking for an updated graphics adapter driver but Windows says the current one is up to date. Screen brightness etc. makes no difference . Screen resolution makes no difference. Any ideas?