l14xclsw.dll is a DLL file used by Lotus Excel Switch Kit created by Lotus Development Corporation. Lotus Software was called Lotus Development Corporation before it was acquired by IBM. Lotus 1-2-3 spreadsheet application was most popular in the 1990s.
The knowledgebase for this and many other DLL base is small. Did you have Lotus 1-2-3 spreadsheet or Lotus Notes as your email application at some point in the past? Obsolete software you used to run on your computer shouldn’t be implanting itself on you hard drive only to pop up when you are in a crunch for time.
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