I can disable UDF in Win9X by running MSCONFIG, but the MSCONFIG in WinXP has no such choice. What can I do to disable UDF?

If you right-click on the cdrw's drive icon and go to it's properties, you turn on/off cd-burning for that particular drive. BEWARE - I have heard of people either loosing the cdrw drive icon altogether when they reboot, or loosing the cdrw functionality when they went looking to reinstall it, or not being able to use something like InCD and Nero 5.x 'cause the system no longer sees the drive as a cdrw.

Thanks, ausBollix. I didn't put my question clear enough. I have a Pioneer DVD 116, which can play DVD movie in Win9x, when I diable UDF there, but I cannot play DVD in WinXP. So I wonder if there is a program similar to MSCONFIG that can diable UDF. Can you help me there, ausBollix? Thanx.

Leo . . . Thanks for clearing that up - this behavior occurs because the Universal Disk Format (UDF) driver (Udfs.sys) in Windows XP and Windows 2000 is unable to read certain data stored on some dvd's. There may be two choices here:- 1) one is to download and install the XP Compatibility update that's available through Microsoft's windows update website. 2) the other MAY be to delete the udfs.sys file (universal disk file system). The only problem with this is two fold - you may not be able to read ANY disk in your dvd drive (which is more likely !!), or the sense of self-preservation that XP has means that, upon the next reboot, XP will restore the missing system file anyway. Let me know what happens . . . A.

no ! it not working. even if u deleted udfs.sys winxp will restore itself for sure. tested ! anymore solution ? cant play all my disney dvd in winxp ! help...

I even try using quarantine with antivirus software but it still there. how the hell !