Steps to delete .dll files:
Click in the search window on the link " All files and folders " and enter the name of the.dll file you want to delete in the empty field.
To remove unwanted DLLs, we must clean the registry and use CCleaner for this purpose. It is a great tool in both installer and portable versions and can also remove temporary files from different browsers and 3rd party tools apart from cleaning the registry. Alternatively we'll use DLLArchive as well.
Run CCleaner and select Registry from the left sidebar, now you'll find Shared DLLs at the top, make sure that they are checked. Now click Scan for Issues and click Fix Selected Issues to remove the DLLs after the scan is complete.