How to Repair DLLs in Microsoft Windows

by Benny Taylor

If you believe you have corrupted DLL files as part of your Microsoft Windows operating-system installation, there is a tool you can use you repair your system files. The System File Checker utility (SFC) is available as part of your operating system.


DLL (Dynamic Link Library) files contain commonly used data and code that is accessed by various application programs as well as the operating system itself. Microsoft Windows makes extensive use of DLL files to perform its various functions efficiently. If these DLL files become corrupted, they can cause errors and problems on your PC.


The System File Checker program checks important system files, including operating-system DLLs, and replaces any files it finds to be corrupt with the original versions. It is likely you will be prompted to insert your original operating-system CD or DVD in the event of the program's finding any corrupt files.


Microsoft provides instructions on how to use the SFC program. It is necessary to run the program from the Command Prompt interface, which is accessible via the Windows Start menu.

About the Author

Benny Taylor has been writing travel, food and computer articles since 2009. His articles about Portugal have been featured by “Living Abroad” magazine. Taylor studied ITIL IT service management in the City of London and is also a Microsoft-certified small-business specialist.

More Articles

Photo Credits

  • photo_camera cd's image by Horticulture from