Search using Google!
http://www.google.com/
(How-to:
http://www.google.com/intl/en/help/basics.html )
Example Finds:
http://www.winxptalk.com/ftopic96408.html
... seems to imply it is related to MSN Messenger
http://www.liutilities.com/products/wintaskspro/dlllibrary/unicows/
"... unicows.dll is a module associated with Microsoft (R)
Windows (R) 95, Windows (R) 98, and Windows (R) Millennium
Operating Systems from Microsoft Corporation ..."
Finally...
http://www.bang.ro/dll/unicows.dll.htm
"... The unicows.dll file is the main dll file from what
is known as the Microsoft Layer for Unicode (MSLU). The
unicows.dll file is actually intended to be used on Win9x
and WinMe operating systems, and its purpose is to provide
a layer over the Win32 API, allowing developers to create
a single Unicode version of their program.
On Windows XP, it appears that this file is not needed
because XP provides such support for Unicode by itself.
However, a rather high number of computer users are having
problems with the unicows.dll file, usually getting error
messages when attempting to run certain progams, mainly
because they try to use programs that need to call this
file, even if they are placed on a Windows XP operating
system. If the the unicows.dll file is missing or
corrupted, applications depending on it will fail to run
..."