I keep getting an error D drive cannot be recognized because of an I/O device error. I have a Toshiba Satellite P25 S2563. I cannot add any software or watch a DVD any more? HELP!! Chuck
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  1. I/O errors usually indicate errors with the hardware. There isn't really much you can do here except replace the drive.

    The only fix you should try before you replace the drive is the UpperFilters and LowerFilters registry fix. Although it does not directly relate to your problem, give it a shot.

    1. Navigate to registry key: HKEY_LOCAL_MACHINE/SYSTEM/CURRENTCONTROLSET/CONTROL/CLASS/{4D36E965-E325-11CE-BFC1-08002BE10318}

    2. Delete UpperFilters and LowerFilters Keys

    3. Reboot

    -------------------------- (ONLY IF NECESSARY, PROCEED)

    1. Right click on Computer and click Manage.

    2. Select Disk Management.

    3. Right click on the DVD drive that isn't working and change the drive letter.

    4. If changing the letter makes it appear, change it back.
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