About defdependencyui.dll Files:
Method One: Fix defdependencyui.dll Error Immediately!Step One: Free Download SmartPCFixer!
Step Two: Double Click SmartPCFixer and click "System Fix", Select "Dll Download".
Step Three: Type your missing defdependencyui.dll files and click "Search", Then download the files and use SmartPCFixer to register it for you.
Method Two: Fix defdependencyui.dll Error by yourself!Step One: Download defdependencyui.dll Files with SmartPCFixer.
Step Two: Extract the downloaded file to the program folder that the defdependencyui.dll file is damaged. Restart your computer and see if it works.
Step Three: If the defdependencyui.dll error still persists, you had better run a SFC for your system Most often, System File Checker might find out the damaged defdependencyui.dll system files for you, and troubleshoot it easily.
Simple Steps to Restore Your System(Windows 7 or Windows Vista)In most cases, to fix defdependencyui.dll error, doing a system restore is really smart and effective.
1. Click "Start", Type "System Restore" in the searching box, then choose system restore as the pictures below.
2. Follow the steps in the wizard to choose a restore point and restore your computer.
Related Reference: http://windows.microsoft.com/en-us/windows7/products/features/system-restore