Oleacc.dll is a process belonging to the Microsoft Active Accessibility program. When you start Encarta 2003 on a Microsoft Windows 98-based computer, you may receive the oleacc.dll error message. This oleacc.dll error only occurs on Windows 98 First Edition machines. Such oleacc.dll error issue may occur if the Oleacc.dll file is missing or is the incorrect version.

Common oleacc.dll error messages:
- "A Required dll Oleacc.dll Was Not Found"
- "Cannot Find Oleacc.dll"
- "Missing Oleacc.dll File"
- "Corrupt Oleacc.dll File"
- "Oleacc.dll Correct Location"

How to install oleacc.dll file?

1. Press Start and select Run
2. Type CMD and press Enter (or if you use Windows ME, type COMMAND)
3. Type regsvr32 oleacc.dll and press Enter
4. In the end, you should receive a message saying that your file was successfully installed or uninstalled.