How to Register COMCTL32.OCX
Try when getting "Runtime error 339 - component COMCTL32.OCX not currently registered; file is missing or invalid" error message.
1. Go to start and type cmd.
2. Right-click on cmd and select "Run as Administrator".
3. Type regsvr32 comctl32.ocx and press Enter.
If successful you should get a pop-up saying "DllregisterServer in comscl32.ocx succeeded"
4. Run TC2000 version 7 to see if this resolved the issue.
If you still get the same error message, please follow the directions in the following article to backup your settings and re-istall TC2000 v7.
How to backup your settings and re-install TC2000 v7 (Clean Install)