Wpcap.dll missing- but can't uninstall or reinstall winpcap

[dalchina]

URL Snooper 2 fails to start now- well, WinPcap more exactly.

"This application has failed to start because wpcap.dll was not found. Re-installing..

But when I try to reinstall (& yes, I did install winpcap) it says 'Winpcap is already installed....!' Catch 22.

There's no add-remove entry for wpcap or winpcap.
Nothing in the registry for wpcap or winpcap.

Ideas welcome! Thanks, David L.