This thread helped me complete first time installation of SONAR Platinum Jamaica Plain Version under Windows 10 on Surface Pro 3. I am new to Windows 10 and had just upgraded the Surface from Windows 7 to Windows 10. I received the "Unable to register the DLL/OCK: RegSvr failed with exit code 0X3" dialog for Classic FX, Artist Instruments, and Platinum Instruments SONAR modules.
After reading this thread I checked for and installed Windows 10 updates. Then tried again to install the three SONAR modules that had failed to install running Command Center as Administrator and with the Windows Firewall and AVAST Free AV active. It worked! My SONAR installation is complete.
I'm not sure that running Command Center as Administrator was necessary as I didn't try to install the three failed modules as non-Administrator after completing the Windows 10 updates.
Though the three failed modules installed fine with Windows Firewall and AV active, I'm not sure the rest of the install would have completed with them active. I had turned the Windows Firewall off for most of the installation and had turned the AV off when I started dealing with the three failed modules.
This old thread continues to be helpful!!
Bill