So when you run the executable (.exe) directly, are you right clicking on the file icon and selecting 'Run as Administrator?'  Something is preventing the installer from updating the registry.
 
This is either a permissions thing, or your registry is hosed. 

yes, i right click and chose Run as Administrator.
 
I was reading that it could be related to the visual c++ library version... but i don't know. I tried to follow the recommended procedure to fix that, but didn't solve it for me. It's a puzzling problem because I know that other products successfully register their x64 dll, so there must be a way to have Sonar also doing that.
 
Maybe I should go in regedit and manually remove somethig related to my previous version of Sonar (Sonar X2)?

Im trying to install Sonar Artist. I have a Win7 64bit desktop. And it will not install. Im gettting the same error as mentioned on this thread.
I did everything listed. I ran all my updates.
 
Any help would be great. I can not get this to work
thank 
grady

Did you see this entry about fixing the DLL/OCX issue in the Knowledgebase? Hopefully something there will be helpful.

Yes I did all that.. Now when I try to launch Sonar I this error.  api-ms-win-appmodel-runtime-l1-1-0.dll 
needs to be reinstalled. 
I did a reinstall...and I still cant launch Sonar.
Not sure If I need to reinstall Win7 64 bit?
 
Im not sure how to get Sonare to Launch

That error is typically associated with missing VC++ runtimes, as here:
 
http://stackoverflow.com/questions/17023419/win-7-64-bit-dll-problems
 
The problem, as it says there, is that there are multiple versions. They are standard Microsoft redistributables so it won't hurt to start with the VS 2015 version:
 
https://www.microsoft.com/en-us/download/details.aspx?id=48145
 
and then 2013. Also see which of them, if any, show up in Programs&Features.