1. Connect your computer to the Internet.
2. Click 'Start' and then click 'Run' if you have the Windows XP operating system. For other systems, simply open Internet Explorer and click 'Safety,' then click 'Windows Update.'

3. Type 'wupdmgr' in the 'Run' dialog box to run Microsoft Update.
4. Click 'Express' to find out if your computer requires new updates.
5. Press 'Install Updates' if any are available. Otherwise, close the Microsoft Update window.
6. Update your anti-virus program and then immediately scan all of the files on your computer.
7. Open the software program that gave the .dll notice to see if error messages still occur. If so, continue to the next step.
8. Reinstall the affected software program to replace the damaged or missing .DLL file. If the issue is still not resolved, contact Microsoft Support.