o_renderman.dll is a module DLL file. DLL files were created to be utilized by more than one program so that your computer can do more using less space. A modular file contains only part of a code that is needed to execute a program or task.
Many DLL files are simply left over files from the incomplete installation or improper removal of a program. These files add up over time. Your computer continually sifts through them to find the files that it does need resulting in a slower process time.
Other DLL files are malicious files that have come to your computer through the internet or email. These files may do damage to your computer, but can also be capturing information about you for organized internet crime. Cleaning your registry can eliminate all of these problems today. Let ZookaWare PC Cleaner do a free scan of your computer and rid you of these pesky errors.