I think the way it's supposed to work, as has been mentioned is if it's installed via CCC then it handles uninstall etc and they probably won't show up in the Windows Programs and Features thing. It may also depend on if you have at anytime installed things manually, for example way back I installed stuff manually for a little while, then as I didn't use SONAR much anymore I just installed things via CCC whenever I decided to update things and have a look. It's been along time since I manually installed Platinum, have been doing it via CCC for a long time, yet the latest update installed via CCC still shows Platinum and the Help and Documentation in the Windows 10 Programs and Features thing dated 08/042017.
 
I can't remember what and when I installed manually, but like I said it's been a long time since I have installed anything manually, it has all been done via ccc for a long time, probably 2 years or so. Below is of Cakewalk related stuff that shows in both my Windows Programs and Features thing and CCC
 
Anderton Content Collection
CA2A
Classic Creative FX Suite
Boutique FX Suite
Drum Replacer
Engineering FX Suite
Loopmasters Content
LPEQ
LPMB
Platinum Instrument Collection
Studio Instrument Suite
Command Center (Of course)
Digital Sound Factory - Vol 3 Vocal Expressions
Digital Sound Factory - Vol 12 Ultra Modern Synths
Dim Pro 1.5
Pro Channel Concrete Limiter
Rapture Pro
SONAR Help and Docs
SONAR Platinum
Z3TA+2
 
Both Windows and CCC show more Cakewalk related stuff, but nothing more that shows in both places
 
Windows 10 Pro 64bit
 

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Ahhh. Makes sense now. Good luck. Yes , I have Win10-64

Thanks for the input everyone. It's strange though that some of the programs show and others don't. Rapture and Dim Pro show but Z3ta+2 doesn't. Strange. It seems to work but I won't know if they made the correct registry entries in order to communicate with other programs and hardware until I hook up the hardware. That looks like Monday. I may contact Cakewalk support as well.

I just checked. On a old back up DAW  ( W7) I installed offline and Sonar is in control panel list. 
On my other computers ( W10) I use CCC and it is not on the program list. You uninstall using CCC. 

I’ve been using you product for years and have never had this issue.  I bought a brand new PC to use only for DAW usage with SONAR.   The last three times I’ve used SONAR the application has died where it would pretend to boot up but it just spins (shows mouse busy) as it was opening application.   I am a developer of windows applications and and familiar with the in and outs of the OS.  I have never experienced this with another application.  When your application drops out  (happened twice today) it will not even show up in Add Remove Programs.  That is absolutely not acceptable.
 
I kid you not - it was working two hours ago now I cannot open SONAR.



What can be done about this?  I believe your company needs to correct or make it right.
 
Thank
 

You should start your own thread. 
You are aware there is nobody to complain to anymore. Gibson closed Sonar down. 
 
Start your own thread and include details of your set up and whatnot. The more details the faster your issue might be resolved. 

I have tended to avoid CCC. But on some of those few occasions when I used CCC to install something, I did notice that the item was missing from the Installed Programs list. I didn't check every time though.