APC UPS / ATS firmware update

APC support will most likely ask you to do it. It didn't solve my problem, but it suppose to be better, and very easy to do.
Here is an example for updating firmware of Automatic Transfer Switch AP7750.

Login to APC.com, and search for ap7750 to get to the product page. Click on Software & Firmware tab, and download the following file.

Run it. After extraction, one Dos prompt windows with the following command will pop up another DOS prompt. That will finish the upgrade.  During the update ATS will remain online, but the management interface will be offline temporarily.

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C:\temp>start /wait upgrd_util.exe

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NMC Upgrade Tool v1.5d

Wed Oct 24 12:16:32 AM

American Power Conversion               Network Management Card AOS    v2.6.4

(c) Copyright 2004 All Rights Reserved  Automatic Transfer Switch APP  v2.6.1

-----------------------------------------------------------------------------

        *************************************************************

        Warning: User name and password information will be displayed

        to the screen in clear text.

        *************************************************************

        IP Address of target to upgrade: 10.10.10.10

        User Name: apc

        Password:apc

        You have entered:

        IP Address: 10.10.10.10

        Username:   apc

        Password:   apc

        1: Continue with upgrade

        2: Re-enter parameters

        3: Quit

        Action: 1

        ***************************************************

        Starting Upgrade to 10.10.10.10.

        Checking network connection ...                  OK

        Testing login ...                                OK

        Saving log files                                 OK

        Checking version information ...                 OK

        Attempting to log in ...                         OK

        Loading OS, please wait ...                      OK

        Please wait (1 minute) for system updates        OK

        Attempting connection to verify restart          OK

        Attempting to log in ...                         OK

        Loading application, please wait ...             OK

        Please wait (3-4 minutes) for system update      OK

        Attempting connection to verify restart          OK

        *********** Upgrade Summary ***********

        All upgrades completed successfully.

        Warning: A file called 'iplist.txt' exists in this directory

        that may contain user names and passwords in clear text.

        You may want to delete this file if other users have access

        to this directory.

        Thank you for using APC products

        Press <Enter> to exit.