Hi YukiLTU,
Your problem description is not detailed. At least, you should record the full error message here.
I suggest you download WMDC installation file again from the following link to make sure the installation file is good.
32-bit: http://www.microsoft.com/downloads/details.aspx?displaylang=en&FamilyID=46f72df1-e46a-4a5f-a791-09f07aaa1914
64-bit: http://www.microsoft.com/downloads/details.aspx?displaylang=en&FamilyID=4f68eb56-7825-43b2-ac89-2030ed98ed95
In order to make sure the system components are good, you can run System File Checker to scan the system.
Run System File Checker
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1. Click “Start” button, “All Programs” and “Accessories”, right click on “Command Prompt” and select “Run as administrator”.
2. Type "SFC /Scannow" (without quotation marks) and press “Enter”.
If some files cannot be fixed, you run the following command to save the detailed log in Drive C.
findstr /c:"[SR]" %windir%\logs\cbs\cbs.log >C:\sfcdetails.txt
Now, I suggest you upload it to SkyDrive and provide us the link for analyzing.
If everything is good, I suggest you try to install WMDC again in Clean Boot. In Clean Boot, other programs will not affect the installation.
If the issue reoccurs, I hope you can capture a screenshot of the error message and upload it to SkyDrive.
How to capture a screenshot
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1. Press the Print Screen key (PrtScn) on your keyboard.
2. Click the "Start" menu, type "mspaint" in the Search Bar and Press Enter.
3. In the Paint program, click the "Edit" menu, click "Paste", click the "File" menu, and click "Save".
4. The "Save As" dialogue box will appear. Type a file name in the "File name:" box, for example: "screenshot".
5. Make sure "JPEG (*.JPG;*.JPEG;*.JPE;*.JFIF)" is selected in the "Save as type" box, click “Desktop” on the left pane and then click "Save".
Please send this saved JPEG file to us.
Arthur Li - MSFT
