I have an hp pavilion a6506 running Windows XP Home Edition using cable through a linksys router (wireless). I just did a Destructive Recovery for the same problems: i.e. my hp dvd writer 400c (Note: can't even find it with the "c") won't recognize DVDs. Particularly, since I've installed Nero #7 Premium, DivX Player, and VSO ConvertXtoDVD, when I go to burn, Nero won't accept my DVD+R blanks, and it has in the past. Moreover, if I go to MyComputer, the drive DVD/CD-RW Drive (E:), I'm fairly sure was +RW, or, it's -RW, but it won't burn to +RW now. The same drive lists as CD Drive (E:) when I insert a DVD+R blank (I wonder that the problem might be here in that the system opens to the desktop listing this drive as above, i.e. DVD/CD-RW, then when I insert a DVD+R, it not only doesn't recognize the blank, but the drive is re-listed to CD Drive (D:). Moreover, if I use a CD, then the drive lights up, indicating in My Computer a CD is in the drive, but if I use the DVD blank, the drive won't light up with the disc icon in My Computer.
To sum, when I go to System folder, the drive is working and usable, but as pertains to DVDs, I can't burn to them, and I think Nero #7 Premium, DivX Player, and VSO ConvertXtoDVD are not able to work their stuff because one of them, or all together have corrupted my system's ability to recognize a DVD blank and therefore are all unable to burn to anything DVD.
Bottom line, I can't read or write to a DVD. Can anyone help?