Thought I might share this in case anyone comes across this problem while installing on of the Sonar versions, here's what I did to fix it......
 
I was just trying to install Sonar Platinum using the new Command Center and after a minute or so I received the following message:
 

Setup was unable to create the directory "E:\Cakewalk Content
Error 3: The System Cannot find the path specified
 

Now I've recently swapped my Samples disk (in my case drive E) for a mapped network drive and the Command Center wants to write to that specific drive, because my Sonar X3 content is installed there, but it can't because it probably doesn't have the system rights to do so.
 
To fix this, I simply moved the 'Cakewalk Content' directory  to another (physical) Hard Disk location (in my case G:\) and then changed the location in the registry.  The specific registry line can be found at:
 

HKEY_LOCAL_MACHINE/SOFTWARE/Cakewalk Music Software
'ContentDir'

Then click on contentdir and change your drive letter. (In my case  E:\Cakewalk Content  to G:\Cakewalk Content)
 
After this I opened the Command Center again, did a reinstall and it worked without any problems. 
 
Hope this helps. 
 
 
 
*edit* NOTE: Try disabling your firewall first. 
 
 
 
 

I wonder if running C3 as admin would have helped.

Nope. tried running Command Center as admin and didn't work.  

Where did you get the new Sonar from? Is it on sale already?

rainmaker1011
Where did you get the new Sonar from? Is it on sale already?

this

A bit off-topic... I've signed up for the presale on the cake website.

"* A few randomly selected SONAR X3 customers will be getting the opportunity to purchase SONAR before it goes on sale to the public. We will send emails to these customers later this week with full purchase information."

liinnerd
A bit off-topic... I've signed up for the presale on the cake website.

"* A few randomly selected SONAR X3 customers will be getting the opportunity to purchase SONAR before it goes on sale to the public. We will send emails to these customers later this week with full purchase information."

I guess I didn't make the list!  Lmao.

Yea I signed up too but got nothing. I guess I gave CW too much grief in the past to get any special treatment...
 
BTW liinnerd is just doing this to us...

Thanks for the feedback and sharing your solution - we'll look into it.
 
RE: run as admin, C3 will always run as admin it should auto-elevate and ask your permission if you run it as a normal user.
 

SilkTone
I guess I gave CW too much grief in the past to get any special treatment...

Don't be crazy Steven, you know I'll always love you 
 
We actually got a lot more people signing up than we were anticipating so the odds of getting picked got smaller. It's only Thursday though - there is still time.

Excellent Willy, good to hear