Test your webcam with a new webcam application (try Yahoo Messenger, Skype, Windows Live Messenger, Quick Play, Youcam, etc.)
Make sure the webcam is working with the new application.
If the webcam works well with the newly installed application, then the problem may be with the built-in web application or the application you used earlier.
Remove the previous application (the one that the webcam does not work) and reinstall it.
Check if your webcam is working.
If your webcam does not work, use the one your webcam is working on.
If your webcam does not work with applications or software, the problem may be with damaged Web server drivers.
Press and hold the Windows key and pause the key.
In the System Properties window, select the Hardware tab, and then click Device Manager.
Click on the "+" sign next to Imaging Tool and check if there is a yellow exclamation point next to the webcam device, if there is a mark, it indicates that the device is in a bad state.
The device can work in this situation, but sometimes it may fail.
If no exclusion mark is found next to the device, follow these steps to isolate the issue.
Reinstall the webcam drivers from the Recovery CD or the Notebook Recovery Partition.
Just check to see if the webcam works.
Repeat the problem by reinstalling the new drivers through the webcam support connection, and if you are using the webcam provided with your notebook, visit the notebook's support site and find the recently published webcam drivers on the driver page.
After reinstalling or installing new drivers, check the problem.
Make sure the Windows Image Acquisition (WIA) feature is set to Automatic if you have not set Auto. WIA is a service that is required to run web applications in the system and needs to be enabled.
You can do this from the Services, click the Windows key, and R at the same time to open the Run window.
Type services.msc in the Run window, and then click OK.
Now scroll through the Services Image Window to Windows Image Acquisition (WIA) and check the startup type. If Auto is not set, double-click the service and set Automatic (next startup type), then click the "Start" button to start the service, and then click Apply. Click OK.
Check if the webcam works.
If the problem persists, the problem may be due to an internal web hardware problem.
Before deciding whether the problem is related to hardware, please check the diagnostic tools on the notebook support site that you can run to resolve the issue and may sometimes be required to perform online diagnostic tests.
If you run Vista on your notebook, make sure Vista Service Pack 1.
If not, upgrade to Vista Service Pack 1 as it has a new webcam driver that is like a hotfix Outlook.
To upgrade from Vista to Vista Service Pack 1:
Please visit the following weblink site to update or download it:
The webcam does not work even if the system resumes hibernation or standby. This is because most video apps were unable to adjust to the performance state of the system.
To resolve this problem, restart the webcam.
If restart does not resolve the issue, restart the computer that resolves the problem.
General procedures have been mentioned, may require some additional steps to isolate the problem. Please contact me for help.