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Hi Ramya.in,

Please share the system model and Operating System installed.

May I know if you are using webcam central or any other application (for example Skype) to access webcam?

Uninstall webcam listed under 'Imaging Devices' in 'Device Manager' by following the steps below':

• Click on “Start” and right click on “Computer”.
• Click on “Manage”.
• Click on “Device Manager”.
• Under “Imaging Devices”, you will find the 'Webcam' listed.
• Right click and uninstall. 
• Restart and see if it makes any difference. 

If issue persists, you may uninstall the USB root hubs and check if it makes any difference. To uninstall USB Root Hubs:

1. Expand ‘Universal Serial Bus controllers’
2. From the list, look for ‘USB Root Hub’
3. Right click, choose ‘Uninstall’, choose ‘Ok’
4. Uninstall all ‘USB Root Hub’ listed
5. Wait for all the drivers to get uninstalled
6. Restarted the computer
7. Restarting the computer will install ‘USB Root Hub’s automatically on the computer 

Once done, uninstall and re-install the 'Webcam' application from control panel and see if it works.

To uninstall open 'Programs and Features' by clicking the Start button  -- > Control Panel -- > Programs -- > Programs and Features --> Select a program then click Uninstall.

To re-install webcam central, click on the link: http://dell.to/SZiyuN (might work)

Steps to download drivers:-

• Click 'Download file' to download the list to a folder you will designate.
• Click 'Save'. Then designate the folder you would like to save the files to.
• Once you have designated the folder you would like to save your files to, Click 'OK'.
• Selected downloads will automatically start downloading. Next is Installation.
• To start installation, Click Open folder. Right-click a downloaded file and select the option to ‘Run as administrator’.
• A small window will appear with 'Continue' and 'Exit' buttons, click 'Continue'.
• In the Select the folder where you want to unzip the files to window, click OK.
• If a message appears asking to create a folder, click 'Yes'. If a message appears asking to overwrite the folder, click 'Yes to All'.
• In the All files were successfully unzipped window, click OK.
• A new window will appear, follow the prompts that appear to finish the installation.
• Restart your computer.

Please share the findings.