Use the output of lsusb from Paul Smedley for your camera.
https://dl.dropboxusercontent.com/u/76425158/lsusb-20130526.zip
1. when I typed lsusb I got
Bus 001 Device 001: ID 046d:0804 Logitech, Inc. Webcam C250
2. When I typed lsusb -d 046d:0804 -v > 046d0804.txt
I got the descriptors in the created 046d0804.txt file.
lsusb is not working, it seems that it has problems finding/loading the usb.ids file, the %OS_DIR% var is not used. lsusb.exe -h works.
Killed by SIGSEGV
pid=0x001b ppid=0x001a tid=0x0001 slot=0x003b pri=0x0200 mc=0x0001
C:\TOOLS\USB\LSUSB.EXE
LSUSB 0:0000f3b6
cs:eip=005b:0001f3b6 ss:esp=0053:0081ff30 ebp=0081ffa0
ds=0053 es=0053 fs=150b gs=150b efl=00010246
eax=00000000 ebx=ffffffff ecx=ffffffff edx=00000000 edi=00000000 esi=0081ffbc
Process dumping was disabled, use DUMPPROC / PROCDUMP to enable it.
I will send the output from the other usb tool, maybe it will tell what is required.