I've tried writing GHOST data files (e.g. SOMENAME.GHO) to DVDs and then closing them on Windows 7. The DVDs don't work properly on another PC. If I write the same files to DVD using ROXIO Easy CD Creator running on Windows XP (and close them ) they work fine. What is the correct way to close DVD discs on Windows 7? Thanks for any replies.

By close I mean "finalize".

Insert a blank disk and observe the options presented to use the disk- one is the Mastered option or finalized disk. Save your data files, insert a blank and use the Windows menu that appears. Start=>Help and Support=>search Burn Disk provides the detailed description of the mastered process.