Help with Nero/DVD Problem?

[J.D3]

Don't know if anyone on here could help me with this, but hopefully they can.

Recently I tried copying a DVD I made with iDVD for some friends of mine, using Nero on my PC to do so, but when trying to copy it the message came up "Unrecoverable Read Error LBA 448" & wouldn't continue.
Known details are as follows:

> Burnt original using iDVD on a G5 Mac, with 1x Apple Prores 422 (HQ) .MOV format video, 1x AIFF format audio track & PNG format images in the theme's drop zones
> Although everything was copied to the Mac, I burnt with all files still linked to my external hardrive
> Original DVD seems to play fine in DVD players & on Mac, but won't play with several PC programs
> All assets were encoded prior to burning, and used the 'Best Performance' option in 'Project Settings'
> I tested an older DVD I burnt with iDVD, & had the same problem on PC

If anyone might know what the issue may be, I'd greatly appreciate the help!

[J.D3]

Never mind! Turned out it was due to a very dusty burner, which was promptly cleaned!