So...
I have a problem.
I don't really know what the problem is, so I'll post what I have:
I have a laptop with a built-in webcam. Now, the thing is, my computer can't establish a connection to this. I thought I had solved the problem when I bought a USB webcam, but no, it still couldn't do anything. It just gives me some stuff about how it (ROUGHLY TRANSLATED)
"Cannot establish preview of the video.

Control the connection to the unit and make sure it's not already in use by another program or by another user"

I have tried restarting the computer and starting the camera, but I still get the same message.
I'm the only user of my computer (Or so I hope).
I googled it, and I found one other person who asked at a Norwegian forum (I don't know what the message exactly reads in English, though I get the meaning), but that was back in '05, and he didn't get any replies.
DxDiag said that there were no problems.
Re-installing Windows, which seems to be the answer to everything, is out of the question, I don't have the discs here.
If there's anything I can do about it without actually opening the computer up, I'll do that, since I'm even more afraid of messing around with the insides of my computer than opening my wallet.

The camera used to work before, but now it's dead, and as I wrote, the USB camera won't work either.
Here's my DxDiag, for what it's worth(PS: It's moonspeak, but you should understand at least some of it).
http://pastebin.com/m57eb562a

Footnote: This is very important to me, if my camera isn't working, I can't flash my wang to little boys on MSN.

HaaaaaahahahHAHAHA! hah heh ahah! HAH!

Not a very useful contribution to the topic. Please put more effort into your posts.

- Electro

That was an intensely useful contribution.
-----------
USB Devices
-----------
+ USB rothub
| Vendor/Product ID: 0x1002, 0x4374
| Matching Device ID: usb\root_hub
| Service: usbhub
| Driver: usbhub.sys, 8/4/2004 14:00:00, 57600 bytes
| Driver: usbd.sys, 8/4/2004 14:00:00, 4736 bytes
|
+-+ USB-enhet for menneskelig grensesnitt
| | Vendor/Product ID: 0x046D, 0xC047
| | Location: USB Optical Mouse
| | Matching Device ID: usb\class_03&subclass_01
| | Service: HidUsb
| | Driver: hidclass.sys, 8/4/2004 14:00:00, 36224 bytes
| | Driver: hidparse.sys, 8/4/2004 14:00:00, 24960 bytes
| | Driver: hid.dll, 8/4/2004 14:00:00, 20992 bytes
| | Driver: hidusb.sys, 8/4/2004 14:00:00, 9600 bytes
| |
| +-+ HID-kompatibel mus
| | | Vendor/Product ID: 0x046D, 0xC047
| | | Matching Device ID: hid_device_system_mouse
| | | Service: mouhid
| | | Driver: mouclass.sys, 8/4/2004 14:00:00, 22912 bytes
| | | Driver: mouhid.sys, 8/4/2004 14:00:00, 12160 bytes
It's not even seeing your camera. Drivers?

Weell...
I did go to Acer's site, and downloaded their camera thing, which appeared to be a driver of sorts. It took some time scanning and rebooting my computer, but it still didn't do anything. The guy I asked in my nearest computer shop recommended me I reinstall, since he couldn't find them either. Now just to get ahold of the guy that I bought the computer through, and who also is in possession of the original discs. Thanks for the help so far, I'll see what I can do.
EDIT: Oh, and since I'm no good with computers, I'd just like to point out that my camera isn't connected via USB, it's built in at the top of the screen. If the driver was supposed to be listed together with the USB devices, that proves how horrible I am with computers, or how ducked-up this situation is.

... I thought you said you bought a USB camera too?

Well, yes... I thought the problem was the camera, and not the driver. That's what happens when people with too much money on their hands get a computer problem.

I've had this trouble with my Xbox 360 camera. Just close my computer, close all setting windows, then open them again, making sure you keep the cam plugged in;

for some reason, the error is displayed when a camera is added when a setting window or my computer is already open.