I’ve got the Hp DVD writer 640B,(which is actually the HLGWA-4162B from LG OEM version) that no longer recognizes +R Dual LAyer disks from any manufacturer. It burns Everything else fine but just doesn’t recognize that a dual layer disk is even there. The weird thing is, when I double click the drive in the My Computer window on XP SP2, it just goes to a blank screen instead of asking you to insert a disk in the drive. Anybody have any ideas? I’ve tried HP Support, and quite frankly, they’re useless. Nothing works. HELP!!!
You must use a REAL burning app for DVDs, even more for DL!!!
Dude hate to tell you, but it ain’t the app. Doesn’t matter what I use, Nothing, and I mean nothing, recognizes a Dual layer disk. Nero, DVD shrink, Copy to DVD, etc. All tried and failed. Tried deleting filters to, no result. I think the Drive is FUBARd.
What exaxct DL media have you tried with?
An LG GWA is OEM, could be that DL burning is disabled by the firmware.
Tried
Verbatim - Worked
Memorex- Didn’t work with DL but RW from same company will.
Fujifilm- Didn’t work
Meaning it worked before, but won’t work now.???
Memorex and Fujifilm DL discs are probably the same stuff = RITEKD01.
Touchdown!!! I got it guys!!! Tried another Verbatim Disk and we’re burning as we speak!!! Thanks for your suggestions though. Greatly appreciated!!! 
On another note, You geniuses(No sacasm at all intended or otherwise) No anything about the Recovery Partion on an HP PAvillion 720N? I wanna try Installing a copy of Windows Vista But I also wann get rid of that damn partion. I’m Trying to ISO it to a DL DVD right now,(the whole point of the original post.) Will it work? or can I go in and some how edit the registry to allow reburning it? i lost my originals, GRRR…
You are not allowed to even have that yet unless your are an MSDN member under NDA… 
LOL 
I know. I checked already. Don’t even have a cracked copy. Just getting ready for when it does come out.