386SPART.PAR
386SPART.PAR (Or "WIN386.SWP") is a hidden file created by
Windows 3.1 for use as
virtual memory swap file. It is generally found in the
root directory, however it may appear elsewhere (typically in the WINDOWS directory). Its size depends on how much virtual memory you have set up under (Control) Enhanced under
Virtual Memory. If you move or delete this file Windows will complain the next time you start it with a Swap File error.
Windows 95 uses a similar file, except it is named WIN386.SWP, and the controls for it are located under Control Panel - System - Performance tab - Virtual Memory.
This article (or an earlier version of it) contains material from FOLDOC, used with permission. Update as needed.