Removing the Plug and Play Driver

7.Examine the registry value InfPath located under

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\ Control\Class\{8CF4CA66-A2CC-48FA-BC1D- 6A64E47F6D27}.

8.Search for the first key which contains the following values:

DriverDesc=Brooktrout TRxStream Board

This key should contain the name of the backup copy of the trxstream.inf file that Windows® created during the device installation under C:\winnt\INF

9.Delete the INF file of this name from C:\WINNT\INF along with the corresponding PNF file.

Except for the extension, the INF file and the PNF file have the same names. For example, if the INF file is oem11.inf, the name of the PNF file is oem11.pnf.

10.Delete the following registry keys: For 32-bit operating system:

HKEY_LOCAL_MACHINE\SOFTWARE\Brooktrout Technology \DeviceCoInstaller

HKEY_LOCAL_MACHINE\SOFTWARE\Brooktrout Technology \DevicePropertyPage

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet \Services\boston

For 64-bit operating system:

HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node \Brooktrout Technology \DeviceCoInstaller

HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node \Brooktrout Technology \DevicePropertyPage

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet \Services\boston

11.Reboot the system and verify that the Brooktrout TRxStream node(s) is not listed under Computer Telephony class node in the Device Manager.

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