Quatech RS-232 - Manual (Page 19)

7. You should now see the "Copying Files" dialog box as Windows 95
copies the driver files from the diskette.
8. The installation utility will ask for your Windows 95 installation
disks. Serial communication ports require two drivers supplied by
Microsoft to function: SERIAL.VXD and SERIALUI.DLL. Insert the
disk or CD and click "OK".
NOTE :
You may be able to skip this step if you are certain that your system has
the latest version of these files installed. If you do not have your
Windows 95 install disks immediately available, click "OK" anyway. A
dialog box appears with an option to Skip the files. Click the Skip button
and the files will not be installed. This is all right if the latest version of
these drivers are currently in the \WINDOWS\SYSTEM directory.
9. The "New Hardware Found" dialog will repeat for each of the
serial ports on the ESC(LP)-100 as each port is registered with
Windows 95.
10. Installation is complete.
ESC(LP)-100 User's Manual 13