Windows Errors

Windows Cannot Start This Hardware Device Code 19 [Solved]

The code 19 windows 7 error can prevent certain hardware components to function normally.
The commen problem code 19 windows 7 error is the cd-rom that stops functioning.

Most of the time this is a registry problem and is easily fixed once you know where to look.

Basically the error code 19 consists of corrupted registry values that need to be deleted to
let the hardware function properly.

Delete the UpperFilters and LowerFilters Registry Values
  1. Go to Start >> Run
  2. Type in: regedit and press ENTER
    Now the Registry Editor Opens
  3. Navigate to the HKEY_LOCAL_MACHINE folder, which is a subfolder of My Computer. Expand This folder. 
  4. Expand the following folders to reach the folder: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class.
  5. BackUp your registry files.This is not mandatory to fix the problem, however it is simply good practise to backup the registry when you are making changes to it. The registry is one of the most important parts of your system.
    Go to File>>Export  choose a name and save anywhere you like
  6. Click on the |> or (+) icon next to the Class key to expand it. Now you see a list of subkeys in the folder class, Navigate to the folder that corresponds to the device that gives you the error. You can select the correct folder from the list below:

    ClassGUIDDevice Description
    CDROM4D36E965-E325-11CE-BFC1-08002BE10318CD/DVD/Blu-ray drives
    DiskDrive4D36E967-E325-11CE-BFC1-08002BE10318Hard drives
    Display4D36E968-E325-11CE-BFC1-08002BE10318Video adapters
    FDC4D36E969-E325-11CE-BFC1-08002BE10318Floppy controllers
    FloppyDisk4D36E980-E325-11CE-BFC1-08002BE10318Floppy drives
    HDC4D36E96A-E325-11CE-BFC1-08002BE10318Hard drive controllers
    HIDClass745A17A0-74D3-11D0-B6FE-00A0C90F57DASome USB devices
    13946BDD1FC1-810F-11D0-BEC7-08002BE2092FIEEE 1394 host controller
    Image6BDD1FC6-810F-11D0-BEC7-08002BE2092FCameras and scanners
    Mouse4D36E96F-E325-11CE-BFC1-08002BE10318Mice and pointing devices
    Media4D36E96C-E325-11CE-BFC1-08002BE10318Audio and video devices
    Net4D36E972-E325-11CE-BFC1-08002BE10318Network adapters
    Ports4D36E978-E325-11CE-BFC1-08002BE10318Serial and parallel ports
    SCSIAdapter4D36E97B-E325-11CE-BFC1-08002BE10318SCSI and RAID controllers
    System4D36E97D-E325-11CE-BFC1-08002BE10318System buses, bridges, etc.
    USB36FC9E60-C465-11CF-8056-444553540000USB host controllers and hubs
  7. In the correct folder you should see one or two of the following keys: UpperFilters and/or LowerFilters.In some cases you also see: UpperFilters.bak or LowerFilters.bak you do not need to delete these.
  8. Delete the Upperfilter and/or LowerFilter keyClick Yes when prompted: "Deleting certain registry values could cause system instability. Are you sure you want to permanently delete this value?".
  9. Close the Registry Editor and Restart windows
This should solve your "windows cannot start this hardware device code 19" problem.

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