and change it from the previous owner to your name.
A quick way to edit the registry is with a REG file. If you copy the following text (everything between the rows of asterisks including the blank line at the end but not the rows of asterisks themselves) and paste it into NOTEPAD then edit the information as indicated you can save it as REGOWNER.REG then by double-clicking it the info will be merged into your registry.
Windows Registry Editor Version 5.00
"RegisteredOwner"="change this bolded text to the new registered owner name"
"RegisteredOrganization"="change this text to the organization is desired or delete this whole line"