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Removing the Plug and Play Driver
November 2009 407
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.