my hp dvd4640 writer doesnt recognize some dvds, but they'll work on another dvd rom, why is this?
473426
The dvd may be in a dual-layer format, in which there are two layers of data, only some drives can read and/or burn them.
124490
You can download the drivers here...would be best to download to your desktop and then put them on a disc for later use..otherwise you will end up like me and not be able to get the drivers for free again at some later date..im still looking for free drivers for my hp cd writer cd16 series, cant get them free on the hp  site anymore..so dont take a chance, burn them to a disc lol
658256
DVD-ROM is a dvd drive, DVD-RAM is a type of DVD http://en.wikipedia.org/wiki/DVD-RAM\nthat can be burned too.  DVD+/-RW is more common.  If you just bought the computer and it is a new computer, you have a DVD-rom drive or a DVD+RW or -RW drive.  DVD-RAM isn't really that common anymore.  Easiest way to check what you I have I have found is to either go check your system components in the control panel, look at your invoice or open up your burning software, odds are if it gives you the option to burn a DVD you have a DVD RW drive and you should just see if it is a + or - RW drive cause their are different blank DVD's to use for each
329010
try Nero DVD Plus Writter...
201907
First of all your CD/DVD drive must support writing on the media and second you need a software like NERO to do that. If you have Windows XP with latest fixpack, even this will do the job for you!
106979
You probably need a decoder to get it to work.  (I am assuming that the DVDs you are trying will work in another player).\n\nGoogle "dvd decoder for windows".  Lots of sites will have decoder info.
1067366
Most likely that you have an old laptop that might not support the DVD proper, perhaps a slow CPU.  We bought some NECs a few years ago that had this problem.  They came with a PCMCIA Margi card that had been since been discountinued, but I did find some that are still being sold via a Google search for $100.  Seems like a lot of money to play DVDs on your laptop, so you might consider a portable DVD player?
717383
There are quite a few factors as to why a driver won't read a disk. A lot of cd players and DVD players made in 2000 or before are not compatible with the CD's and DVD's made now. Some CD's have a different make up or quality where as your older ones will probably play in that driver, the new ones aren't recognized. Try putting it in a newer player to see if it works. Also, if it's a burned cd, some older players don't play those. Or the cd may not have been finalized after burning. Otherwise there might be another problem that I can't help u with and my have to contact your tech support or where u bought the product.
683888
Its not the computer, its the driver.\n\nLook on your CPU and see if you have a DVD driver. It should say DVD on it. If it just says CD-ROM then you cant burn DVDs.
346350
if its new you could try re-installing it.  if its old maybe the laser is burned out.  maybe the dvd is not write-able.\nif you just bought it take it back to the store for an exchange.
212460
Try it in a different PC. They should all work the same but some floppy drives are fussier than others, and sometimes they just don't like disks formatted in a different drive.
602710
Why do you need a driver for the DVDrom?\nWindows should detect the DVD.\n\nbut you may need the DVDPlayer software.\n\n\nAny way\n\ncheck the hitachi webpage\nif not\ncheck the site below
891405
u can download nero dvd writer from any shareware\nwww.softdon.org, \nwhy dont u try freedownloadcenter or download.com\nwww.thefreecountry.com/utilities/\nif u have a dvd writer hardware then u must have a software too.\njust check it in cds u got at the time of computer purchasing
50393
if you're using the dvd, try downloading a dvd ripper program, like super dvd ripper. if it's the files, i think you need to burn them to another blank dvd and then rip them from the second dvd.
516875
There is absolutely no reason why you cannot use a DVD writer on this PC. Changing the drive can be a bit tricky on these Pavilions. As most retail DVD writers come with software you should be able to record both CDs and DVDs.
216126
make sure you have the updated drivers for your DVD drive.
806425
Possibly don't have any software to view them with?  Just guessing.  Do they come up as files with little x's?  Something is missing for sure.  Never had the problem...hope someone can help you figure it out.  Maybe contacting HP would be the best answer.