cleaned hardrive...cant find cd drive

am selling laptop advent 8170 so i cleaned hard drive but now my cd
has dissapered....it dosnt show in system or device manager....if i
put cd in it powers up and spins but cant see it anywhere
how can i get it back...i tried this and got all the way through to
step 7 but couldnt find lower filters...........thanks 4 any help
..Method 1: Remove the registry entry
Warning Serious problems might occur if you modify the registry
incorrectly by using Registry Editor or by using another method. These
problems might require that you reinstall your operating system.
Microsoft cannot guarantee that these problems can be solved. Modify
the registry at your own risk.
Note If you had installed multiple CD-writing software products on
your computer, you need to uninstall the software products before you
remove the registry keys.1. Click Start, and then click Run.
2. In the Open box, type regedit, and then click OK.
3. Locate and then click the following registry subkey:
HKEY_LOCAL_MACHINE/System/CurrentControlSet/Control/Class/{4d36e965-
e325-11ce-bfc1-08002be10318}
4. On the File menu, click Export.
5. In the File name box, type savedkey, and then click Save.
6. Click the REG_MULTI_SZ data type UpperFilters, and then click
Delete on the Edit menu. When you are prompted to confirm the
deletion, click Yes.

Note If this data type is missing, go to Method 2.
7. Click the REG_MULTI_SZ data type LowerFilters, and then click
Delete on the Edit menu. When you are prompted to confirm the
deletion, click Yes.
8. Quit Registry Editor, and then restart the computer.
..

try going into device manager and look for new hardware
or control panel and add new hardware
"gram" <grampage@hotmail.com> wrote in message
news:1182947854.950488.91680@o61g2000hsh.googlegro ups.com...
> am selling laptop advent 8170 so i cleaned hard drive but now my cd
> has dissapered....it dosnt show in system or device manager....if i
> put cd in it powers up and spins but cant see it anywhere
> how can i get it back...i tried this and got all the way through to
> step 7 but couldnt find lower filters...........thanks 4 any help
> .Method 1: Remove the registry entry
> Warning Serious problems might occur if you modify the registry
> incorrectly by using Registry Editor or by using another method. These
> problems might require that you reinstall your operating system.
> Microsoft cannot guarantee that these problems can be solved. Modify
> the registry at your own risk.
> Note If you had installed multiple CD-writing software products on
> your computer, you need to uninstall the software products before you
> remove the registry keys.1. Click Start, and then click Run.
> 2. In the Open box, type regedit, and then click OK.
> 3. Locate and then click the following registry subkey:
> HKEY_LOCAL_MACHINE/System/CurrentControlSet/Control/Class/{4d36e965-
> e325-11ce-bfc1-08002be10318}
> 4. On the File menu, click Export.
> 5. In the File name box, type savedkey, and then click Save.
> 6. Click the REG_MULTI_SZ data type UpperFilters, and then click
> Delete on the Edit menu. When you are prompted to confirm the
> deletion, click Yes.
>
> Note If this data type is missing, go to Method 2.
> 7. Click the REG_MULTI_SZ data type LowerFilters, and then click
> Delete on the Edit menu. When you are prompted to confirm the
> deletion, click Yes.
> 8. Quit Registry Editor, and then restart the computer.
> .
>