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Windows 7 doesn't recognize CD-ROM

Windows 7 doesn't recognize CD-ROM
Windows 7 doesn't recognize CD-ROM
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Once in a while something unexpected happens with the system. It was works fine for several months, CD-ROM was working properly, without glitches. Suddenly, for no apparent reason CD-ROM disappears from "Computer" and stops working altogether. Device Manager does detect CD-ROM, but says that it was installed with errors. BIOS does recognize it. If you delete CD-ROM from the "Device Manager", Windows 7 detects it again, but can not properly install the driver. The latest driver fails to install. Don't cry yourself into despair, this problem has a solution.

  1. Remove CD-ROM from Windows 7 Device Manager.
  2. Run regedit (Start → Run → regedit).
  3. Find in the registry the following key: /HKEY_LOCAL_MACHINE/SYSTEM/CurrentControlSet/Control\Class/{4D36E965-E325-11CE-BFC1-08002BE10318}
  4. Rename LowerFilters to something else, for example LowerFiltersTest.
  5. Close Registry editor.
  6. Reboot the computer.
  7. After rebooting, Windows 7 will find the CD-ROM and install its drivers as it did first on first try but this time successfully.
  8. If this strategy fails, do the same thing but with the parameter UpperFilters.

That's it! Nothing complicated, right? And most importantly, no need to reinstall the system!

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