3com wl-552 firmware cd

Usually the upgrade routine is in the router program. Log into the router and find the option to upgrade to latest firmware.

You can download the firmware from this WEB site.
http://webtopicture.com/download/download-3com-wl--firmware.html

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The downloaded file is "corrupt", and thus it fails the "verification" process.

Download the firmware again, and compare the two files.

Or, use a different computer to download the firmware, and to do the firmware-update.

I had the same problem with the Ipod of my son.
To solve the problem, just upgrade your Firmware to the latest version. This will allow u to define the new MAC address. But the problem is that this firmware version doesn't work well, reseting the router every couple of hours. So to solve this problem, after you upgraded the FW and defined the MAC address, downgrade the firmware to you previous version, the new mac address will still there.
This workaround you need to do every time that you want to define any new MAC address

Go into the bios on your computer and shut down the onboard LAN, find a 3com or realtek LAN card and install it, windows has the drivers build in for most 3com cards, then you go to IBM site, download the drivers you need for the onboard LAN connection, remove the 3com card let the computer boot up, and when it asks for the driver point it to where you downloaded the drivers for the onboard LAN.

Please go to the router page and enter in to wireless security option. You will be able to see your password which you entered earlier.

Try to upgrade the firmware of your router.

There are actually 3 models of the WL-542. Go to this page and select "All downloads" in the section matching your model. You will find the exact model number on a sticker on the side or under your WL-542.

http://www.3com.com/products/en_US/searchbyproduct.jsp?search=3CRWDR100&sort=fname&searchby=sku

Are you able to login to the router? If you can reset the router to factory defaults..If you can't login to the router...Is there an external reset button on the router you could try to reset. with a paperclip? Otherwise, I had this happen on a linksys router/switch. New router time. You should just return it where you purchased the product. There was already something seemingly going wrong if it was rebooting. 3 weeks? just return it. don't even mention the firmware update. Here is the site info for 3com: http://knowledgebase.3com.com/ OfficeConnect - Firmware upgrade fails with incorrect user interface image Problem: Incorrect user interface image Problem: Firmware upgrade fails Problem: Error when upgrading firmware Problem: Incorrect firmware Problem: Wrong firmware Fact: Firmware Fact: Download Fact: Update Fact: Upgrade Cause: The downloaded .exe has not been extracted Fix: The downloaded .exe needs to be extracted by double clicking on it. When performing the firmware update use the extracted files that were obtained from the "exe" file. e.g You will obtain a "bin" or "dlf" type of file which is the firmware required for your upgrade. Let me know what happens. Good Luck, Tim