windows 7 display

[ben12321]

specs are
ProcessorAMD Sempron 3500+
Hard Drive: 160GB Hard Drive
Memory: 1024MB DDR RAM
Optical Drive: DVD±RW Drive
Accessories: Card Reader
Operating System: Windows Vista Home Premium

just installed windows 7 and the screen is flickering and distorting pictures. have upgraded drivers graphics are nvidia 6100 integrated any ideas what could be the problem ?

cheers

 

[ultrakipper]

Does it flicker before windows starts (booting up), if so could be the monitor or a loose connection