I'm guessing that since you say you also had the issue with V9 it was cleared up? I don't think this is a Cakewalk error because many of use here have successfully installed Waves v10 on CbB.
One thing that seems to hang up some users is not completely removing all of the old Waves files before the new install. This is likely why letting Waves tech support into your computer could help. Either that or find where the old folders are located.
Opening files with administrative privileges might help. Some have reported success in making a new vst folder- c:\program files\vst and installing plugins to it. I wouldn't recommend that though if plugins are installed under a correct folder.
I don't believe it's a Cakewalk issue.