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,I have windows xp home edition and I had upgraded to pro but had problems so went back to home edition. My cd rom drives don't work. I went into the registry l into device class and found the folder HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\DeviceClasses\{4d36e965-e325-11ce-bfc1-08002be10318}. How could I find and reinstall it?

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  • geolor2 Sep 13, 2010

    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4D36E965-E325-11 CE-BFC1-08002BE10318}is missing that. That is why I need help.

  • geolor2 Sep 13, 2010

    I still do not have the subkey
    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4D36E965-E325-11CE-BFC1-08002BE10318}in my registry. Deleting and installing the dvds was no help.

  • geolor2 Sep 14, 2010

    I don't think you see my problem there is no subkey HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\DeviceClasses\{4d36e965-e325-11ce-bfc1-08002be10318} in my registry. Can you help me with that?

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I'm wondering just what problems you had with Pro vs. Home. They are identical with Pro having some benefits of allowing more networked computers, some security enhancements, etc. So now my question is just how you went back to Home? Any way other than reformatting the hard drive and doing a clean install will result in errors--the computer will have a problem seeing parts of two systems installed.
A clean install should solve this problem. For just a CD problem, Google the phrase "CD Gone". This will lead you to a patch that fixes it when the computer refuses to see your CD

Posted on Sep 13, 2010

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  • Art Ellison
    Art Ellison Sep 14, 2010

    People normally don't go looking in the registry for no reason and particularly don't look for subkey values unless they are told to do so.
    You didn't say--why did you go looking for this particular key? Did you get an error message? Have you tried to run the CDGone utility? It addresses a registry error that keeps the CD's from being seen.

  • geolor2 Sep 14, 2010

    It was part of the trouble shooting error message. CDGone did not help.

  • Art Ellison
    Art Ellison Sep 14, 2010

    That's sor of strange--removing the upper and lower filters is exactly what the CDgone utility does. I usually suggest that to people, as I almost never recommend that people mess with registry entries directly. There is entirely too much chance to damage Windows. I'm glad you were able to solve it.

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Hi. Just delete the the upper and lower filters and restart the machine. That should do it. Follow the procedure below.

Windows XP loadTOCNode(2, 'resolution');

  1. Click Start, and then click Run.
  2. In the Open box, type regedit, and then click OK.
  3. In the navigation pane, locate and then click the following registry subkey: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4D36E965-E325-11CE-BFC1-08002BE10318}
  4. In the right pane, click UpperFilters.

    Note You may also see an UpperFilters.bak registry entry. You do not have to remove that entry. Click UpperFilters only. If you do not see the UpperFilters registry entry, you still might have to remove the LowerFilters registry entry. To do this, go to step 7.
  5. On the Edit menu, click Delete.
  6. When you are prompted to confirm the deletion, click Yes.
  7. In the right pane, click LowerFilters.

    Note If you do not see the LowerFilters registry entry, unfortunately this content cannot help you any further. Go to the "Next Steps" section for information about how you can find more solutions or more help on the Microsoft Web site.
  8. On the Edit menu, click Delete.
  9. When you are prompted to confirm the deletion, click Yes.
  10. Exit Registry Editor.
  11. Restart the computer.

Posted on Sep 13, 2010

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Press windows key +R key so you can see run then type in run "devmgmt.msc" then press ok so you can see device manager uninstall cd rom drivers then it automatic install it's drivers.
then check.
Also you need to change registry for that type in run "regedit" then press ok then you can see registry editor then locate below key.
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4D36E965-E325-11 CE-BFC1-08002BE10318}
And remove upper filter and lower filter.Then restart computer then check.After restarting it automatic create registry entry.

Let me know if you need further assistance.
Thanks for using FixYa

Posted on Sep 13, 2010

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