The answer is bang on, but some clarification that might help some not familiar with registry editing (like me).
- Run regedit.
- Find [HKEY_LOCAL_MACHINE\SOFTWARE\JavaSoft\Java Development Kit]
- Right click on the key and click export, then save the file to the desktop.
- Right click then click edit.
- Add Wow6432Node to the path of each key in the file. See above (@Rog_enk) for an example. Save.
- Back in regedit, click File->Import and select the file from above. Done.
- Try the SDK installer again.