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click start control panel view devices and printers you should see your webcam from there
if you are have trouble with your webcam

click start control panel administrive tools computer management device manager scroll down image devices you could see a yellow question mark?
right click to reinstall drivers or update driver xp

click start right click on computer select properties device manager scroll to image devices expand right click to update driver software if you dont have the driver you will need to download one here are a few you could try although i could not find one for windows 7

http://download.cnet.com/drivermax/3000-18513_4-10572602.html
free drivers solution for 2000/XP/Vista/7/8

Some webcams and programs require additional software, although that should be installed with the webcam if things are right.

But is does not harm to check if your Java, Flash and Quicktime software are installed and up to date.
But certainly check your DirectX software, since all video applications, including webcams, use DirectX for video processing.

Try downloading the latest DirectX version and install it (Windows XP: DirectX 9.0c - Windows Vista: DirectX 10).
http://windows.microsoft.com/en-US/windows7/Which-version-of-DirectX-is-on-your-computer


hope this helps

The ksuser.dll file is one of many files contained in the DirectX software collection. Since DirectX is utilized by most Windows based games and advanced graphics programs, ksuser.dll errors usually show up only when using these programs.


Resolution
Important Note: Do not download the ksuser.dll DLL file individually from any "DLL download site." There are a number of excellent reasons that downloading DLLs from these sites are never a good idea.

Note: If you've already downloaded ksuser.dll from one of those DLL download sites, remove it from wherever you put it and continue with these steps.

1. Restart your computer if you haven't yet.

The ksuser.dll error might be a fluke and a simple restart could clear it up completely.

2. Install the latest version of Microsoft DirectX. Chances are, upgrading to the latest version of DirectX will fix the ksuser.dll not found error.

Note: Microsoft often releases updates to DirectX without updating the version number or letter so be sure to install the latest release even if your version is technically the same.

Note: The latest version of DirectX should be installed no matter if you're running Windows 7, Windows Vista, or Windows XP. The installation may include DirectX10 and DirectX9 files but they run side-by-side without problem on all of these operating systems.

3. Assuming the latest DirectX version from Microsoft doesn't fix the ksuser.dll error you're receiving, look for a DirectX installation program on your game or application CD or DVD. Usually, if a game or other program utilizes DirectX, the software developers will include a copy of DirectX on the installation disc.

Sometimes, though not often, the DirectX version included on the disc is a better fit for the program than the latest version available online.

4. Uninstall the game or software program and then reinstall it again. Something might have happened to the program files that work with ksuser.dll and a reinstall could do the trick.

5. Restore the ksuser.dll file from the latest DirectX software package. If the above troubleshooting steps haven't worked to solve your ksuser.dll error, try extracting the ksuser.dll individually from the DirectX downloadable package.

6. Update the drivers for your video card. While it's not the most common solution, in some situations updating the drivers for the video card in your computer could correct this DirectX issue.

click start control panel view devices and printers you should see your webcam from there
if you are have trouble with your webcam

click start control panel administrative tools computer management device manager scroll down image devices you could see a yellow question mark?
right click to reinstall drivers or update driver xp

click start right click on computer select properties device manager scroll to image devices expand right click to update driver in W7




Some webcams and programs require additional software, although that should be installed with the webcam if things are right.

But is does not harm to check if your Java, Flash and Quicktime software are installed and up to date.
But certainly check your DirectX software, since all video applications, including webcams, use DirectX for video processing.

Try downloading the latest DirectX version and install it (Windows XP: DirectX 9.0c - Windows Vista: DirectX 10).
http://windows.microsoft.com/en-US/windows7/Which-version-of-DirectX-is-on-your-computer


hope this helps

http://download.cnet.com/acer-crystal-eye-webcam/3000-2108_4-188685.html

http://download.cnet.com/acer-crystal-eye-webcam/3000-2110_4-202548.html

Dinput.dll errors usually appear when a game or other software program is started. and are caused in one way or another by an issue with Microsoft DirectX.

The dinput.dll file is one of many files contained in the DirectX software collection. Since DirectX is utilized by most Windows based games and advanced graphics programs, dinput.dll errors usually show up only when using these programs.

Solutions:

1. For Dinput.dll not found. Reinstalling Direct X should fix this.

2. Install the latest version of Microsoft DirectX. Chances are, upgrading to the latest version of DirectX will fix the dinput.dll not found error.

Note: Microsoft often releases updates to DirectX without updating the version number or letter so be sure to install the latest release even if your version is technically the same.

Note: The latest version of DirectX should be installed no matter if you're running Windows 7, Windows Vista, or Windows XP. The installation may include DirectX 11, DirectX 10, and DirectX 9 files, but they run side-by-side without problem on all of these operating systems.

3. Assuming the latest DirectX version from Microsoft doesn't fix the dinput.dll error you're receiving, look for a DirectX installation program on your game or application CD or DVD. Usually, if a game or other program utilizes DirectX, the software developers will include a copy of DirectX on the installation disc.

Sometimes, though not often, the DirectX version included on the disc is a better fit for the program than the latest version available online.

Uninstall the game or software program and then reinstall it again. Something might have happened to the program files that work with dinput.dll and a reinstall could do the trick.

Restore the dinput.dll file from the latest DirectX software package. If the above troubleshooting steps haven't worked to solve your dinput.dll error, try extracting the dinput.dll individually from the DirectX downloadable package.

4. Update the drivers for your video card. While it's not the most common solution, in some situations updating the drivers for the video card in your computer could correct this DirectX issue.

Here is a good link for DirectX info on how to download and install:
http://support.microsoft.com/kb/179113

Hi! Have you installed your video card's driver? if yes, then its time for you to download the latest driver release for your videocard. And also, make sure that your directX is current directX 9.0c atleast. You can download the newest version of directX which is version 11 at http://www.microsoft.com/downloads/dlx/en-us/listdetailsview.aspx?FamilyID=2da43d38-db71-4c1b-bc6a-9b6652cd92a3 have fun!

the best ways of making a Graphic card is
1-updating it's drivers and directx weekly.
2- update your bios with latest updates.
3- update the CHIPSET DRIVER of your motherboard.
you can download latest driver and directx from here:
DRIVER:
(for vista and windows7) http://filepig.org/download/ati_catalyst_drivers_10.5_vista/
(for windows xp) http://www.brothersoft.com/ati-radeon-display-driver-for-windows-xp-61460.html

DIRECTX
version 11 (for windows7 and vista) http://www.techmixer.com/download-directx-11-for-windows-7-directx3d-11/
version 9 (for all windows types) http://directx.en.softonic.com/download

please don't forget vote

If you've already downloaded d3d9.dll from one of those DLL download sites, remove it from wherever you put it and continue with these steps.

1. Restart your computer if you haven't yet.
   
   The d3d9.dll error might be a fluke and a simple restart could clear it up completely.
   
   
2. Install the latest version of Microsoft DirectX. Chances are, upgrading to the latest version of DirectX will fix the d3d9.dll not found error.
   
   Note: Microsoft often releases updates to DirectX without updating the version number or letter so be sure to install the latest release even if your version is technically the same.
   
   Note: The latest version of DirectX should be installed no matter if you're running Windows 7, Windows Vista, or Windows XP. The installation may include DirectX10 and DirectX9 files but they run side-by-side without problem on all of these operating systems.
   
   
3. Assuming the latest DirectX version from Microsoft doesn't fix the d3d9.dll error you're receiving, look for a DirectX installation program on your game or application CD or DVD. Usually, if a game or other program utilizes DirectX, the software developers will include a copy of DirectX on the installation disc.
   
   Sometimes, though not often, the DirectX version included on the disc is a better fit for the program than the latest version available online.
   
   
4. Uninstall the game or software program and then reinstall it again. Something might have happened to the program files that work with d3d9.dll and a reinstall could do the trick.
   
   
5. Restore the d3d9.dll file from the latest DirectX software package. If the above troubleshooting steps haven't worked to solve your d3d9.dll error, try extracting the d3d9.dll individually from the DirectX downloadable package.
   
   
6. Update the drivers for your video card. While it's not the most common solution, in some situations updating the drivers for the video card in your computer could correct this DirectX issue.

Applies ToThe d3d9.dll error message could apply to any program that utilizes Microsoft DirectX, most commonly video games. Any of Microsoft's operating systems since Windows 98 may be effected by d3d9.dll and other DirectX issues. This includes Windows 7, Windows Vista, Windows XP, and Windows 2000.

Note: If you've already downloaded ddraw.dll from one of those DLL download sites, remove it from wherever you put it and continue with these steps.

1. Restart your computer if you haven't yet.
   
   The ddraw.dll error might be a fluke and a simple restart could clear it up completely.
   
   
2. Install the latest version of Microsoft DirectX. Chances are, upgrading to the latest version of DirectX will fix the ddraw.dll not found error.
   
   Note: Microsoft often releases updates to DirectX without updating the version number or letter so be sure to install the latest release even if your version is technically the same.
   
   Note: The latest version of DirectX should be installed no matter if you're running Windows 7, Windows Vista, or Windows XP. The installation may include DirectX10 and DirectX9 files but they run side-by-side without problem on all of these operating systems.
   
   
3. Assuming the latest DirectX version from Microsoft doesn't fix the ddraw.dll error you're receiving, look for a DirectX installation program on your game or application CD or DVD. Usually, if a game or other program utilizes DirectX, the software developers will include a copy of DirectX on the installation disc.
   
   Sometimes, though not often, the DirectX version included on the disc is a better fit for the program than the latest version available online.
   
   
4. Uninstall the game or software program and then reinstall it again. Something might have happened to the program files that work with ddraw.dll and a reinstall could do the trick.
   
   
5. Restore the ddraw.dll file from the latest DirectX software package. If the above troubleshooting steps haven't worked to solve your ddraw.dll error, try extracting the ddraw.dll individually from the DirectX downloadable package.
   
   
6. Update the drivers for your video card. While it's not the most common solution, in some situations updating the drivers for the video card in your computer could correct this DirectX issue.

GOOD LUCK AND PLS RATE THIS POST AS FIXYA!!!!!

Go to the following site, copy the d3drm.dll and save it to your c:\windows\system32 folder