How to Uninstall Repair Corrupt DLL Files in Vista

1. Click 'Start' and click 'Run.'
2. Type 'cmd' in the 'Open' text box, and click 'OK.' This opens the command-line utility.
3. Type 'sfc/scannow' without the quotes. The System File Checker checks your system for damaged DLL files. Once done, it provides you with a list of corrupted files and indicates whether it was able to repair them.
4. Type 'Exit' in the command window to close it when finished with the scan.