One uncommon but possible cause of TGC being unable to connect is that TGC may not have been able to completely or properly install itself due to an overly-aggressive Antivirus or Firewall program that prevented part of the installation.
For Windows users, please follow these steps:
1. Uninstall the MindWave software by going to Add/Remove devices,
and removing the "NeuroSky MindWave" software.
2. Next, restart the computer and disable all Antivirus and
Firewall programs.
3. Finally, re-install the MindWave software.
For Mac users, please follow these steps: 1.
Disable all Antivirus and Firewall programs.
2. Next, re-install the MindWave software.
If this does not resolve the issue, please see the following
article:
http://support.neurosky.com/kb/mindwave/thinkgear-connector-is-disc...
http://support.neurosky.com/kb/mindwave/cant-find-mindwave-or-cant-...