Here is some info on "WinOldAp".....

From Alan Edwards MVP:

I can shed a little light on Winoldap. It existed in Win3.x as
Winoldap.mod and it Win9x it exists as this file:
C:\WINDOWS\SYSTEM\WINOA386.MOD enhanced mode winoldap and is the
module used to run MS-DOS-based applications, otherwise known as "old
applications")

From Richard G. Harper MVP

Winoldap is a support file for running MS-DOS based applications under
Windows.  Normally it should be loaded while the program is running
and then unloaded when the program is finished.

From Jeff Richards MVP

It is required to support display requirements for certain 16-bit
applications, including a DOS session.  It is started automatically
when an application that requires it is loaded. It can prevent some
installation procedures from running, so there are circumstances when
you need to shut it down.