Webcam screen all black

I have installed a plug and play webcam on my xp pro computer and device manager says it is working but I only get a black screen.
I followed the post on this topic and renewed the usb root hubs but it didn't help and the webcam works on a laptop so I assume the problem is with the xp driver.
Following the post re Identifying your webcam etc. I find the ids are:
USB\Vid_1e4e&Pid_0102&Rev_0101&MI_00
USB\Vid_1e4e&Pid_0102&MI_00
USB\Vid_1e4e&Pid_0102
And while I can find the second one on Google I can't download it from any of the sites.
I end up with a driver search that says the existing driver is current.
Where do I go from here?

"I have installed a plug and play webcam"...

What is the make and model of this webcam? Is it USB?

Yes it is a USB webcam and it loaded first as a USB composite device and then as a USB Video device.
I can see the webcam through control panel/scanners & cameras but the screen is all black.

Once again, What is the make and model of this webcam? We need this info to find the proper software if any...

I don't know as there is no indication on the either the unit nor on the package.
Is there any way can I find out?

No name at all on the package? Where did you buy the camera?

XS cargo.
And I exchanged it when the first one didn't work but this one does the same thing.
However it works fine on my laptop.
I notice that device manager shows the usb composite device manufacturer as OWC but it shows the USB video device as Microsoft even though they are the same unit.

"However it works fine on my laptop"...

This tells me that you have a program on the desktop that is causing the webcam not to function. Do you have any Windows Live programs installed? What program are you trying to use this webcam with? Are you in Canada?

No I do not have windows live and want to use the webcam with skype but it can't find it.
And Yes I am in Surrey BC, Canada.

Nice area. I have been to Vancouver,BC...
Try downloading and running this Temp File Cleaner:
http://www.geekstogo.com/forum/files/file/187-tfc-temp-file-cleaner-by-oldtimer/

Run this from the desktop. Was there ever another camera installed on this desktop PC?

Well I ran it and you had me worried for a while as the computer refused to shut down.
However after a half hour I cut the power and eventually it booted OK but with no change to the webcam.
As for any previous webcam I can't really say as I bought the computer used some years ago but this is the only one I have installed.

What version of Windows is installed? You do have some issues with this computer that will need more attention

XP pro Ver 5.1 sp3
And it sometimes takes forever to boot up but when I first got it some years back it was good and fast.

Can you re-install Windows fresh? Do you have a Windows install disk or a restore function on the desktop?

I don't have the windows disc but I have found windows restore.
However it only seems to have restored the status for the last week but will try restoring to the earliest one tomorrow when I will have some free time.

Well I ran restore to the earliest date and it screwed up my anti-virus so had to finally remove that and re-install it.
But still no improvement in the webcam output. Screen still black and Skype can't find it.

I was talking about a "factory restore" not a Windows restore point. You need to have Windows installed fresh

OK! Thanks for your efforts.

FYI.
After all that playing around my webcam now works on Skype but I still can't see a picture through Control panel/scanners & cameras.

" I still can't see a picture through Control panel/scanners & cameras"...
Windows is not designed to do that from Scanners and Cameras, but programs like Windows Live Messenger should work