Copying DVD using 1 Click DVD or Sony. It burns enough to make coasters, then get error message: Code 05 21 02 (Illegal request, Invalid address for write). I have to defrag after this, as it makes a mess. This has been happening 2-3 months. AnyDVD used to work 99.9% of time. Does anyone have any suggestions? I should add that I have uninstalled anyDVD and tried W43 which didn't work either. Thank you for this forum. It is much needed and appreciated.