Uninstalled each of these one by one, rebooting after each uninstall. No luck.
Uninstalled DVD drivers as well, just in case. Rebooted and XP recognised
the drive and reinstalled the drivers. No luck still.
Uninstalled Nero 6. Reboot. No luck.
Rollbacked Windows Media Player 11. Reboot. No luck.
I went into safe mode and the drive was not able to read my DVD+Rs either.
Inserted original Logitech Install CD, no luck (thought it might've been the
burned CDs that was the problem but nope).
I have an external dvd+/-R USB writer which i installed. XP was able to
recognise the discs I inserted via the external writer, but not the
notebook's dvd drive.
Update - now even the original PC DVD and DVD movie cds are unreadable when
inserted into the notebook drive.
Any other suggestions, greatly appreciated!