Avec Google.fr : Microsoft+error 1303
The error is related to privileges of the user account. The error 1303 occurs if -The SYSTEM group does not have Full Control privileges or The Everyone group does not have Full Control privileges.
Refer to the Microsoft article for more details. The article is for office setup but you may use the steps for resolution to your issue - http://support.microsoft.com/kb/306986
You may try to take the ownership of the folder and then use the steps to grant permission to everyone.
Before taking ownership I would suggest you to create a new restore point so that the system may be reverted back in case of any loss of data or irregular behavior.
Follow the steps in the below link to create a restore point - The System Restore tool uses restore points to return system files and settings to an earlier point in time. You can use it to restore the operating system to a point in time in which you did not experience the problem. To restore back you need to have a restore point available so I would suggest you to create a new restore point before taking ownership of the folder –http://windows.microsoft.com/en-US/windows7/Create-a-restore-point
You may take the ownership of the folder and then use the steps to grant permission to everyone –
Locate the file or folder on which you want to take ownership in windows explorer
Right click on file or folder and select “Properties” from Context Menu
Click on Security tab
Click on “Advance”
Now click on Owner tab in Advance Security Settings for User windows
Click on Edit Button and select user from given Change Owner to list if user or group is not in given list then click on other users or groups. Enter name of user/group and click ok.
Now select User/group and click apply and ok. (Check “Replace owner on subcontainers and objects” if you have files and folder within selected folder)
Click ok when Windows Security Prompt is displayed
Now Owner name must have changed.
Now click Ok to exist from Properties windows
Once you have taken the ownership of file or folder
Grant Permissions to everyone-
Go to C:\Users\ and then click right click on folder "Your user name" and choose properties.
Then go to security tab and click Edit then click Add => Advanced.
If you click on advanced now click on Find Now and choose Everyone and click Ok.
Then again click Ok and now click on Allow => Full control => Ok.
If the issue persists, I would suggest you to create a new use account with administrator rights and then try to perform the changes and check if the steps work for you -http://windows.microsoft.com/en-us/Windows7/Create-a-user-account
DISCLAIMER: Affecting system settings incorrectly can cause serious problems that may prevent your computer from booting properly or may result in loss of data. Microsoft cannot guarantee that any problems resulting from the configuration of ownership settings can be solved. Modifications of the settings are at your own risk.
Hope this helps. Let us know the results.Thanks, Meghmala – Microsoft Support