There is no way for them to know that you are running it on more than one box, because Cakewalk has made Sonar non-invasive. THANK YOU CAKEWALK. 

That said, they've given me the go ahead to install on multiple computers as long as I'm not running it on both at the same time. It's all about the spirit of the license. I actually own 3 copies (purchase 2 for two studio computers that do run at the same time with another engineer operating it) and a copy came with the vstudio 700 which is just sitting around :)

but yeah, please Cakewalk, NEVER create copy protection. You'll only severely piss off us legitimate users and everyone on pirate bay will STILL get working cracked copies in a matter of minutes. 

Sorry to dig upi the past but I had the same question... which was answered here, and here at the "Product Registration FAQ":
http://www.cakewalk.com/register/faq.aspx

Does this limit the number of times I can install my Cakewalk product?

You can uninstall and re-install the software on your computer without having to worry about re-registering or being locked out of the software.

Per the End User License Agreement, your purchase of the software grants you the nonexclusive license to have one person use the software on one personal computer at a time. If you want to use the product on more than one personal computer at a time, or if you want to network the product, you must obtain separate licenses from Cakewalk.

If you have a second computer that you use on occasion, such as a personal laptop you use when away from your desktop, you may install the product on to the additional computer. You do not need to register the product again, simply use the same registration code tied to your account that has been generated for your unique serial number. Note that per the EULA, the software must only be running on one computer at a time unless you have purchased an additional license.

DOES ANYONE KNOW HOW TO INSTALL THIS SOFTWARE ON A WINDOWS SURFACE TABLET I ALREADY REGISTERED IT
AS ITS THE NUMBER FROM MY  pc

glevi3
DOES ANYONE KNOW HOW TO INSTALL THIS SOFTWARE ON A WINDOWS SURFACE TABLET I ALREADY REGISTERED IT AS ITS THE NUMBER FROM MY  pc

 
Your question was already answered in one of the above posts. Just use the same serial and registration code that you were given when you registered the software. 

A GREAT many users of Cakewalk software have a great deal of appreciation for the Cakewalk company being kind enough to allow the non-simultaneous use of their products, meaning as long as you are only using their products on a single machine at a time, it can be installed on more than a single computer.
 
It is a matter trust by them, in part, and is greatly appreciated by the Cakewalk users - many of whom have to deal with those #%!(*!#%(* dongles, or other means other companies use to limit use of their software.
 
So - enjoy, yes you can install on your laptop and on your desktop, just honor Cakewalk and never betray the trust they have placed in you.  Make sure you support them, through honest use of the software, and honoring your agreement, and Cakewalk will do its best to provide the best software they can.  :)
 
Bob Bone