I received an error when I tried to install the driver again. Is there any way to delete the registry values?

* Caution: Incorrect registry setting could cause fatal errors to the Windows OS. Take extreme care when deleting registry values.
The procedure of deleting the registry is as follows.
1. Enter “regedit” in Start->Run menu, and click the [OK] button.
2. Registry explorer will be executed.
3. Remove the following data.
3-1.HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Print\Environment\Windows NT x86\Printer Processors\…
3-2. HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Print\Monitors\…
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