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I'm trying to go back to the 5.1.3 version after uninstalling the beta software. The USB drivers are not installing. I have tried the install with the cameras unplugged but no joy.

Of course, all installs/uninstalls done with admin account.

Please help me get the USB drivers installed.

Here is the install log:

11-4-2012
Install Log Entry Begin (Installation):
DirectX version : 09
DirectX version is okay
OS = Win 2K/XP
Component USB from 0 to 1
Component APP from 0 to 1
Component DOCS from 0 to 1
Component MSFS2002 from 0 to 0
Component PROFILES from 0 to 1
Scanning for old INF files - WITHOUT PROMPTING
Clean USB Drivers for 2K/XP : VID_131D&PID_0155
Found file (removing) : C:\Windows\inf\oem22.inf
Clean USB Drivers for 2K/XP : VID_131D&PID_0156
Clean USB Drivers for 2K/XP : VID_131D&PID_0157
Clean USB Drivers for 2K/XP : VID_131D&PID_0158
Install USB Drivers for 2K/XP : VID_131D&PID_0155
ReInstallUSBDevices loaded setuphlp.DLL :
Error = 0
Install USB Drivers for WinNTx64 : VID_131D&PID_0155
RegisterDriverINF UpdateDriver4PnP Failed! :
USB\VID_131D&PID_0155 AND C:\flightsim\NaturalPoint\TrackIR5\Drivers\npusbio_x64.inf
Error = 183
SetupCopyOEMInfA Called
Install USB Drivers for 2K/XP : VID_131D&PID_0156
ReInstallUSBDevices loaded setuphlp.DLL :
Error = 0
Install USB Drivers for WinNTx64 : VID_131D&PID_0156
RegisterDriverINF UpdateDriver4PnP Failed! :
USB\VID_131D&PID_0156 AND C:\flightsim\NaturalPoint\TrackIR5\Drivers\npusbio_x64.inf
Error = 183
SetupCopyOEMInfA Called
Install USB Drivers for 2K/XP : VID_131D&PID_0157
ReInstallUSBDevices loaded setuphlp.DLL :
Error = 0
Install USB Drivers for WinNTx64 : VID_131D&PID_0157
RegisterDriverINF UpdateDriver4PnP Failed! :
USB\VID_131D&PID_0157 AND C:\flightsim\NaturalPoint\TrackIR5\Drivers\npusbio_x64.inf
Error = 183
SetupCopyOEMInfA Called
Install USB Drivers for 2K/XP : VID_131D&PID_0158
ReInstallUSBDevices loaded setuphlp.DLL :
Error = 0
Install USB Drivers for WinNTx64 : VID_131D&PID_0158
RegisterDriverINF UpdateDriver4PnP Failed! :
USB\VID_131D&PID_0158 AND C:\flightsim\NaturalPoint\TrackIR5\Drivers\npusbio_x64.inf
Error = 183
SetupCopyOEMInfA Called

Try right clicking on the TrackIR installer and choosing "Run as Administrator" (even if you are on an administrator account). It appears that something is blocking the drivers from being installed.