As windows security improves, more effort is made to alert users of "questionable" software. Such is the case with CVI executables which bear no digital signature and upon invocation bring up the "Open File - Security Warning". While users have the option to run or cancel, a digital signature is the right way to address the issue.
Great info! Were you asking about getting products
signed by Microsoft, or creating your own signature scheme? Looks
like that link was for win mobile users. I think this one is for regular Win32 users.