[Koha] internal server error

[Carmel Young]

Koha 2.2.9 on Windows.

After many power and Internet hassles, we are back.  Still haveing
trouble with two functions of Koha 2.2.9.
1.   Can't get the loc search funtion to work.
2.    Can't generate barcodes.
The following mesage is displayed;
 Internal Server Error
The server encountered an internal error or misconfiguration and was
unable to complete your request.
Please contact the server administrator, webmaster at dummy-opac and
inform them of the time the error occurred, and anything you might
have done that may have caused the error.
More information about this error may be available in the server error log.

As suggested, I went to the error folder in Apache config. and read
from the HTTP_INTERNAL_SERVER_ file and read this:

The server encountered an internal error and was
    unable to complete your request.

    <!--#include virtual="include/spacer.html" -->

But I did not know where to insert this!!!  Sorry!!!  Looking for help, again!
Thanks in anticipation,
Carmel