Mozilla Firefox - NIS NTB Vault issues

Hi, FF 29.0.1 (28 and 27 also), latest version of NIS with latest version of NTB/Vault, running on Win 7 machine, question: Has anyone tried a Win 7 repair, or complete clean system reinstall to see if it fixes the issue of the NTB/Vault buttons becoming unresponsive after a few minutes and/or the settings messages in IDS: Mozilla Firefox (default browser):status could not be determined and Mozilla Firefox (default browser): Extension disabled Thanks.