Hi,
cakewalk sonar X1 is compatible with Windows 7.
Error 3 means "path not found". It's because the DLL or OCX is missing, or a dependency is missing. Most likely, the setup program was unable to write one of the files. This can be caused by having a file in use, or insufficient Windows permissions.
Method 1: Install the program in elevated mode and see if that helps.
Follow the step mentioned below:
Right click on the .exe file of the program and click on run as adminstrator.
Method 2: Fix problems with programs that can't be installed or uninstalled:
http://support.microsoft.com/mats/Program_Install_and_Uninstall
Method 3: Install the program in clean boot and see if that helps.
Here is the link:
http://support.microsoft.com/kb/929135
Note: After you have finished diagnosing, follow step 7 in the article to boot to normal startup.