The Filetrace service is a file system driver. If the Filetrace fails to load or initialize, the error is recorded into the Event Log. Windows 7 startup should proceed, but a message box is displayed informing you that the Filetrace service has failed to start.
Note. Make sure that the filetrace.sys file exists in the %WinDir%\system32\drivers folder. If this file is missing you can try to restore it from your Windows 7 installation media.
SMB MiniRedirector Wrapper and Engine is a file system driver. If SMB MiniRedirector Wrapper and Engine fails to start, the error is recorded into the Event Log. Windows Vista startup proceeds, but a message box is displayed informing you that the mrxsmb service has failed to start. If you disable this service, then 2 other services will be unable to start (see the "Dependencies" section below).
SMB MiniRedirector Wrapper and Engine will not start, if the Redirected Buffering Sub Sysytem service is stopped or disabled.
If the SMB MiniRedirector Wrapper and Engine is stopped, the following services will not start and initialize:
NVIDIA nForce AGP Bus Filter is a kernel mode driver. If NVIDIA nForce AGP Bus Filter fails to start, the error is recorded into the Event Log. Windows Vista startup proceeds, but a message box is displayed informing you that the nv_agp service has failed to start.
Note. Make sure that the nv_agp.sys file exists in the %WinDir%\system32\drivers folder. If this file is missing you can try to restore it from your Windows Vista installation media.