Lose the drivers of sony dvd rw aw-...

Click the Start button, and in the Start Search field, type regedit and then press the Enter key.
NOTE: If prompted for an administrator password or a User Account Control prompt is displayed, type the appropriate password or click Continue.

In the Registry Editor window, in the left pane, double-click the HKEY_LOCAL_MACHINE folder.
In the HKEY_LOCAL_MACHINE folder, double-click the System folder.
In the System folder, double-click the CurrentControlSet folder.
In the CurrentControlSet folder, double-click the Control folder.
In the Control folder, double-click the Class folder.
In the Class folder, click to select the {4D36E965-E325-11CE-BFC1-08002BE10318} folder.
In the right pane, click to select the UpperFilters registry value.
On the menu bar, click Edit.
In the Edit menu, click Delete.
In the Confirm Value Delete dialog box, click the Yes button.
In the right pane, click to select the LowerFilters registry value.
On the menu bar, click Edit.
In the Edit menu, click Delete.
In the Confirm Value Delete dialog box, click the Yes button.
In the Registry Editor window, click the X in the upper right corner to close the window.
Restart the computer.

DVD drive will now be back in your system.

This seems to be a known issue caused after removing a CD/DVD recording program - like Roxio CD Creator - in Windows XP.

See Microsoft Support, which presents exactly the same solution as General Ghou and amitpandey suggest: http://support.microsoft.com/kb/314060

Obs: Pay attention to the registry key location (4D36E965), since there may be other very similar ones.

I had this problem, and that fixed it.

I have performed the fix above 2 or 3 times. It works at first to fix the problem but then reverts back and stops working after a few days. The only fix that lasts at least a few months is to do a system recovery that sets your computer to factory settings. But then you have to start from scratch installing the programs you want and it takes forever to put back your files the way you want and even then I lost some of my files in the back up process.

Go to
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4D36E965-E325-11CE-BFC1-08002BE10318}
And delete "Upperfilters" and "Lowerfilters" and then restart. (Do not delete if it ends in ".bak")
Alternatively, reinstall pxengine from the Vaio Recovery Wizard