i have recently upgraded my satellite 1800-920
From:
20GB HDD, 250k RAM windows 2000XP pro, office pro 2000

To:
60GB HDD, 500K RAM windows 2003 XP pro, office pro 2003

every thing is cool apart from one thing.
when i scroll up or down a page, whether it be a web page or a document page. the page appears to 'ripple' in the direction of scroll?

also, when i play a movie on 200% or full screen, the same effect happens.
none of this never happened prior to the upgrade.

can somebody help please?