Since installing Windows Xp I cannot burn a Data Cd at full speed using Nero. Every time I try I get error message saying....Invalid Block address and then invalid writesite. It happens when burning large files such Avi's. I have tried everything but can only burn data cd's at 4x, But I can write a audio cd at full speed. Can Anyone Help .....I cant really find the answer on the Nero site.. I also tried useing EZ CD creator and I am having the same problem but I just get a different error message. I did install the New Updates for Xp and sill canot Burn Data Cd's at Full speed.