Fixing Missing DLL Files by Reinstalling the Error Causing Program
1. Click on 'Start' and then on 'Control Panel.'
2. Click on 'Programs.'

3. Click on 'Uninstall a program.'
4. When the list populates, find the program that caused the DLL problem and click on it as if you are going to uninstall it. DO NOT REMOVE THE PROGRAM FROM YOUR COMPUTER! Microsoft Windows Installer has a feature that allows a user to repair a malfunctioning program instead of deleting it and reinstalling it.
5. When the Installation Wizard starts, click on the repair option to fix the program. Follow the steps in the installation wizard.
6. Once the Installation Wizard is finished, restart the computer. Log in and open the program to see if it works. If the program functions correctly, this completes the process of fixing the missing DLL files. If it doesn't, move on to Section 2.
Fixing Missing DLL Files by Reinstalling DLL Files
7. When the DLL error appears on your computer screen, write down the name of the DLL.
8. Open your web browser and type the name in the search bar.
9. In the results, find a link where the missing DLL can be downloaded. To ensure the safety of your computer, make sure the DLL information is spelled correctly and that the website is secure.
10. Download the DLL file and save it to the DLL-containing folder inside the folder of the error-causing program. For instance, if the DLL is missing from Windows Media Player, save it in the Windows Media Player DLL folder.
11. Open the program that brought about the system error. It should run properly now.