Hello, Welcome to Bleeping Computer.
Look at this ariticle: http://support.microsoft.com/default.aspx?...kb;EN-US;310123
Below I have pasted the relevant parts. Let us know if you need more help in understanding this.
Windows cannot start this hardware device because its configuration information (in the registry) is incomplete or damaged. To fix this problem you can first try running a Troubleshooting Wizard. If that does not work, you should uninstall and then reinstall the hardware device. (Code 19) Recommended resolution
A registry problem was detected.
This can occur when more than one service is defined for a device, if there is a failure opening the service subkey, or if the driver name cannot be obtained from the service subkey. Try these options:
On the General Properties tab of the device, click Troubleshoot to start the Troubleshooting Wizard. Click Uninstall, and then click Scan for hardware changes to load a usable driver. Restart the computer in Safe Mode, and then select Last Known Good Configuration. This rolls back to the most recent successful registry configuration.
As a last resort, you can edit the registry directly.