So with the news of cakewalk going away I thought I would make sure I got the latest update that I am entitled to before the servers go away. (whenever that might be)  Using the CCC, I attempted to update sonar platinum.  Everything downloaded and started installing.  At about 99% installation I got errors that certain dlls could not be registered.  These were mainly in c/programs/cakewalk/shared.  Things like auto120, arpeggiator, chord analyzer, etc.  Older midi tools that I really don't need.  So I tried to just ignore them.  The installation completes and CCC tells me that Sonar installation is complete.  It even congratulates me!
 
However, when I try to launch, it says that is can't because my computer is missing a file:  api_ms_crt_runtime l1-1.dll
 
I tried uninstalling Sonar from within CCC; deleting files from within CCC by right mouse clicking over the sonar platinum name and select delete files.  I then re-booted and tried re-installing.  Same thing.  I tried rolling back tot he second to last update.  No luck.  Same thing.  Will not launch and same errors on those midi dlls.
 
Any ideas?  All my audio files are there on my D drive.  Not much use without the program to run the project files.
 
Please help.
 
Thanks,

I’d reboot and try again. It worked for me after updating to the Creators version, I didn’t try before. This was a couple weeks ago. No problem.
Good luck!

I did re-boot, uninstalled and re-installed.  No luck.  What is the creators version?

Sometimes these are C++ 2013 issues. You may have to download and repair those libraries. Google it and you'll get a link to Microsoft's website for links.
 

Thanks emwhy,
I'll look into that.  Would running windows update fix it?  i keep the music computer offline and only connect when installing or updating programs.
 
 
 

There has been an issue with W10 update causing dll files to become  0 bytes. 
Make note of which dll are corrupted and go find them. Right click and look at the properties. Is it zero? 
The fix was to have a back up of these somewhere else and overwrite the corrupted files. Just a long shot. 

tubeydude
Thanks emwhy,
I'll look into that.  Would running windows update fix it?  i keep the music computer offline and only connect when installing or updating programs.

If you were running any OS other than Win 10, I'd say make sure you're up to date -- but with Win 10, it's kind of a high-wire act.
 
If you are on Win 10, how far behind with updates are you?

I'm on wind 8.1 64 bit.  I have not updated it.  I guess I'll try that.
 
I found a few of the dlls in question and they were there and similarly sized to the other ones.

I know exactly what your problem is.
 You need to install the latest version of Microsoft Visual C++ Redistributable.

I'm running windows update right now.  83 updates are happening right now.  (those are just the important ones).
 
Is visual C++ Redistributable going to be included in those updates, or will I need to install that by itself afterwards?
 
Thanks