
  If you are using Quarterdeck's memory manager product "QEMM", you may
experience a problem when installing your After Dark screen saver product.
The problem is only with installation, and does not affect After Dark itself.
Very few users have it, but if you see a Windows dialog during installation
that reports an error with "IS20INST", and then the installation exits,
then you have the problem.  To avoid it, you need to temporarily comment
out the QEMM lines in your system's CONFIG.SYS file, as detailed below.
(For complete instructions on editing system files, please refer to your
Microsoft Users Manual.)

Here is the procedure:

0. Exit and re-start Windows (do this because of the IS20INST error).

1. In your CONFIG.SYS file, find the lines that look like this:

     DEVICE=C:\QEMM\DOSDATA.SYS ...
     DEVICE=C:\QEMM\QEMM386.SYS ...

   (Your system may be slightly different, for example there will probably
    be extra parameters on the lines, indicated by "..." above.  The important
    point is that you want the lines that load DOSDATA.SYS and QEMM386.SYS)

2. Change these two lines by inserting    REM     in front of them:

     REM  DEVICE=C:\QEMM\DOSDATA.SYS ...
     REM  DEVICE=C:\QEMM\QEMM386.SYS ...

3. Add the following line, just above where the above two lines are:

     DEVICE=C:\DOS\HIMEM.SYS

   (If your system has HIMEM.SYS located somewhere else, for example in the
    C:\WINODWS directory, then adjust this new line accordingly.)

4. Save the changes, exit Windows normally, and reboot your system.

5. Start Windows, and run the After Dark installer.

6. After the installation has completed succesfully, don't forget to re-edit
your CONFIG.SYS file and undo the above changes (take out both "REM"s so that
the lines look like they did before, and remove the line about HIMEM).


NOTE FOR TECHNICAL USERS: The problem is actually with QEMM's "Stealth" mode
and certain specific video cards.  We're working with them to find a fix!

