Member Avatar for Walt

I upgraded Windows Me to Windows XP and my CD burner, Lite-On LTR 48246S is not recognized by my CDRWIN burning program. I installed the Lite-On myself and have used it for months, but I have lost the installation CD for the burner. It seems as if a driver is missing.

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  • Latest Post Latest Post by Catweazle

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The problem described by is a common XP-upgrade symptom: the drive hardware often remains usable but older burning software can no longer talk to it. Two frequent root causes not spelled out above are the missing ASPI layer that older burners rely on, and stray registry filter entries left by prior CD-writing software that block access.

Check whether Windows actually sees the drive first (Device Manager -> DVD/CD-ROM drives). If the drive appears in Explorer but CDRWin does not, verify the ASPI layer by looking for the Adaptec DLL in System32:

dir %windir%\system32\wnaspi32.dll

If that file is missing or an ASPI checker reports problems, reinstall a Windows-compatible ASPI layer (many legacy apps expect one). If the drive does not appear at all, do a quick hardware sanity check: power/activity LED, jumper/cable seating, try the drive on the other IDE channel or in a different PC.

Another frequent fix is to remove UpperFilters and LowerFilters values left in the CD-ROM class key. Back up the registry first, then inspect:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class{4D36E965-E325-11CE-BFC1-08002BE10318}

If you find UpperFilters or LowerFilters, export that key and then delete those values and reboot. This often restores access without reinstalling drivers.

If a firmware or vendor driver is later required, follow ’s suggestion to source official Lite-On support files; if the burning app itself is very old, consider updating it (or an XP-compatible replacement) rather than forcing legacy layers. ’s point about compatibility remains valid—start with ASPI/registry checks before reinstalling software or swapping hardware.

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Member Avatar for Killer_Typo

you should probably go the manufacturere's website and look for replacement drivers if you cant find the CD anymore.

and i believe these are the drivers you need for the burner

http://www.liteonit.com/ODD/WebFW/LTR-48246S/R48SS0E.zip

if that link does not work you can navigate there by going here.

Member Avatar for Catweazle

You may have an early version of CDRWin which is not compatible with Windows XP. Did you run the 'Upgrade Compatibility' utility on the Windows XP CD before you performed the upgrade?

In any case, CDRWin is not the best of burning programs by any stretch of the imagination. I would suggest that you uninstall it and replace it with something better, such as Nero. For mow, though, try this:

- Uninstall CDRWin
- From 'Device Manager', uninstall your CD burner.
- Reboot, and allow Windows XP to redetect your drive
- Reinstall CDRWin

If CDRWin was on that CD you lost, then:

a) You got ripped off, and....
b) You're buggered!

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