The certificate for this program is not valid.
A certificate contains information that a specific software program is genuine. This ensures that no other program can assume the identity of the original program. Certificates are also dated when they are issued. When you try to download software, Internet Explorer verifies the information in the certificate and that the current date precedes the expiration date. If the information is not current and valid, Internet Explorer can display a warning.
This program has a certificate but it cannot be verified.
Any software or component you install can potentially harm your computer, or the software or component may be unstable.
To view details about the certificate, click the underlined software publisher's name or program name in the dialog box.
Given what you know about this software, its publisher, and your computer, you must decide whether to proceed with installing and running this software.
If, given this information, you still do not feel confident about installing this software, then click No.