Hi I am installing a fresh Sonar in a freshly installed Windows 7 and I am unable to install Platinum instruments because of following error message: (I am translating from friench because my OS is french)
 
"Impossible to save library DLL/OCX:RegSrv32 failed with exit code 0x3.
 
Any idea what this is about?
 
Thanks

The SONAR installer is failing to register some DirectX components. This is often caused when Windows is not up to date. Make sure Win7 is current.

This may resolve the problem.. it worked for me before,
 
https://www.youtube.com/watch?v=JVI82XHBIcw