Answer

PROBLEM

When attempting to re-install the Brookrout TR1034 drivers, you see the following error message:

Driver version already installed

This may occur even though the TR1034 Drivers have been uninstalled.

Ensure that all local Antivirus applications are disabled
Ensure the Brooktrout TR1034 Driver Uninstall Utility has been run prior to following the remaining steps.
Ensure the the Brooktrout Boston Host service has been removed. To remove manually, open an elevated command prompt and use the command "sc delete bostservice"
Delete the following registry keys:
- HKEY_LOCAL_MACHINE\SOFTWARE\GFI FAX&Voice\Brooktrout_Driver_Installed (REG_DWORD)
- HKEY_LOCAL_MACHINE\SOFTWARE\GFI FAX&Voice\Brooktrout_Driver_Build (REG_SZ)
- HKEY_LOCAL_MACHINE\SOFTWARE\GFI FAX&Voice\Brooktrout_Driver_License (REG_SZ)
  - Note: If installed on a 64 bit platform, the registry path for the above keys can be found at: HKEY_LOCAL_MACHINE\SOFTWARE\WoW6432Node\GFI FAX&Voice\
Attempt to re-run the TR1034 driver install (run brooktrout_tr1034.exe found in ..FaxMaker\brooktrout directory)
- If a 64 bit Operating System, run the brooktrout_tr1034_x64.exe install

Sometimes upon install, the Brooktrout TR1034 drivers become corrupt. Local Antivirus running at the time of installation may relate to the issue.