How to update the firmware of D-Link DSL-2750U wireless router

So, I have had the router for almost 2 years now and there haven't been any significant problems as such.

Recently, I moved the router location as I doing some renovation and it's now placed in another room. This resulted in a fairly large drop in signal performance and now many corners of the house show poor signal.

So, while trying to resolve this problem, I remembered a long pending task on the router. To update the firmware! The default firmware 1.00 had a new version 1.10 out in 2011 - but I had tried earlier and spent 2-3 evenings trying to unsuccessfully update this firmware and had finally given up.

This time I thought I will try it again and I was successful, after a little bit of a hit-and-miss! If you also want to update your firmware, here's my list of things-to-do that will hopefully help you update it without any hassles.

0. Check your firmware version by looking at System Info on admin interface of the router.
1. Get the latest firmware from D-link India site - D-Link India site - click on Support and then Firmware.
2. It's version 1.10 as of now and comes as zip file.
3. Extracting the zip file will give you a .IMG file with a very long name.
4. I recommend you rename this file to a short "dsl-2750u.img"
5. I also recommend that you then put this file in your C:\ drive root folder rather than in a sub-directory.
6. Now, connect your laptop physically to the router using a RJ-45 network - the regular Ethernet cable.
7. Disconnect wi-fi access on your computer by disconnecting from the wi-fi network of the router or disable wi-fi temporarily.
8. Make sure that you are connected via Ethernet by browsing the web, and checking the network icon in your system tray.
9. I recommend that you switch off the wi-fi service on the router by pressing the WIFI button located next to the USB port on the router. The wifi icon will go off on the router.
10. I strongly recommend that you use Internet Explorer to complete this task.
11. Browse to the Admin User Interface of the router by browsing the management IP - typically 192.168.1.1 and give your user name and password.
12. Go to Management menu item on the left and then click on "update software".
13. Select the file from the C:\ folder using the browse button.
14. Click on upload software. In my case, every time I had to press the button twice :-) - but if you have pressed it correctly, you will get a message "Update is progress - please wait for a minute"
15. Don't do anything else!
16. WAIT.
17. WAIT.
18. You should see a new screen showing upload in progress.
19. Don't do anything - WAIT.
20. Keep waiting - if you observe your router, the buttons will flash at some point and indicate that it is restarting.
21. Subsequently, your page should refresh and the home page of the management interface should reload.
22. If everything went well - your system should show System version as 1.10!
23, Press the WIFI button again to restart the wifi service and use your newly upgraded modem/router!

Happy upgrading!