If you happen to still have a Windows 98 machine or a Windows 95 machine (who will have it in today's era?), and you have a hard-disk having large amount of DLL files this tiny app might be a good solution for you.
Clean System Directory 1.7 scans your PC for stray DLLs and deletes them. Unfortunately, this older gem is only for Windows 95 or 98 machines. If you have an older machine lying around this is a great utility to add to your collection.
Download Clean System Directory 1.7