Some users may see a warning from Windows stating that "Windows requires a digitally signed driver." The message reports (erroneously) that a certain file does not have a digital signature.
All components of ShareBrowser are in fact digitally signed with a valid certificate. The Windows message in question is shown because ShareBrowser (starting with v.4.3) uses the newer SHA-2 digital signing method recommended by Microsoft, and this process is not acknowledged by versions of Windows that support only SHA-1 by default.
To address this problem it is required to run a system update or patch the older version of your Windows system so that it can use an SHA-2 signed certificate.
To fix this, it is needed to install the respective Windows updates, as described in https://technet.microsoft.com/en-us/library/security/3033929.aspx
This can be done either by downloading and installing all available updates, or by manually downloading and installing the following updates:
Further reading: Microsoft KB3033929