DLL files are very important components of the Windows operating system. It helps the applications to work easily. But sometimes it happens that due to missing or corrupt d3d10core.dll file, you may see d3d10core.dll is missing error in Windows. It is a very annoying and dreadful situation as you will not be able to open or start the application that you want to work with. In this situation, you should go through the manual methods given in the article. But applying manual method is not an easy task. You should have a sound technical knowledge to go with manual procedure. Therefore, using Advanced System Repair tool to fix d3d10core.dll error will be good decision.