Since Java 6 the SunMSCAPI provider is part of the JRE, enabling software written in Java to access the native cryptographic services and key containers of the Windows platform.
In KeyStore Explorer you can open the "Windows-MY" KeyStore, which contains the user's personal certificates and associated private keys.
To open the Windows-MY KeyStore:
Note that due to restrictions of the SunMSCAPI provider not all features are available, that would be available for other keystore types.