o_sw3d.dll is a module DLL file of unknown origin. DLL files were created to be accessed by more than one program thus allowing computers to perform at a higher rate of speed while utilizing less space.
Module files typically contain part of a code that is necessary to perform a task. Useless DLL files are commonly the result of the incomplete installation or removal of a program, but because there is as much and maybe even more malicious software being produced today than legitimate software, you can’t be too careful.
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