A. You can use registry files to import information into the registry, but you can also use them to delete a value by including a hyphen (-) as the value's data. In the following example, I delete the valueName value from key HKEY_LOCAL_MACHINE\SOFTWARE\SavillTech\key.

                              \[HKEY_LOCAL_MACHINE\SOFTWARE\SavillTech\key\]                              "valueName"=-