I used to do all my burning to 4gig and 8 gig DVD roms with no problem. Now that I've upgraded to Vista, I have problem. I have made NO hardware changes, only an operating system change from Windows XP Pro to Windows Vista Ultimate. New Operating System: Windows Vista Ultimate Retail 32 Bit (Clean install, no upgrade from XP, fully patched OS) AnyDVD Verison: 188.8.131.52 CloneDVD Version: 184.108.40.206 Hardware: 3.2 ghz Intel system (Self built), ASROCK P4V88 Motherboard DVD Burner: External Plextor DVDR (PX-716A) IEEE 1394 SBP2 Device (connected via Firewire 1394A) Media: Verbatim DVD+R DL I'm using the same media I've always used successfully before (Verbatim). For dual layer media... CloneDVD seems to read the original 8.5 gb dual layer movie disk fine. When I put in the new media to be burned (Verbatim DVD+R DL), it errors out in the initial write sequence. It sees the blank media, says setting up...erasing... pauses for about 60 seconds, then displays the following error: Tried two more DVD blanks (Verbatim DVD+R DL) to make sure it wasn't a media problem. All failed in exactly the same place, in the same amount of time. :doh: I also own some software called PlexTools Professional XL (Version 3.12). I tried creating DVD files (video/audio directories) with CloneDVD2 which worked fine. Then I tried burning these files with PlexTools. (Verbatim DVD+R DL media) PlexTools also errored out on the initial write sequence to DVD. Windows shows a bunch of errors in the event log that coincide with my burning attempt times: Log Name: System Source: cdrom Date: 2/13/2007 4:57:47 PM Event ID: 51 Task Category: None Level: Warning Keywords: Classic User: N/A Computer: ******** Description: An error was detected on device \Device\CdRom1 during a paging operation. Now that you know all this info.... I put 4.7gb DVD+R media into the drive, and CloneDVD2 can reduce the size and it burns the DVD+R media JUST FINE - NO PROBLEMS. Conclusion: It only seems to have problems with 8.5 GB DL media! Help!!!!!!!!!!!!!