License no. is unrecognised

Hello Indrani,
We apologize for the inconvenience.
This issue can happen, if the older version of AVG Internet Security installed in your computer We suggest you to remove the old traces of AVG from your computer and install the latest version. Use this link to download and run the AVG remover tool http://download.avg.com/filedir/util/AVG_Remover.exe
Note: Once the removal of AVG is complete, go to C Drive and delete the AVG remover folder. After which you can install AVG Internet Security latest version from this link http://files-download.avg.com/inst/mp/AVG_Internet_Security_742.exe.
Thank you

Hi
I have been using AVG for almost last two years and for the first time, getting an error message saying that it cannot recognize the license no. I have renewed this particular one in February 2016. When I tried to uninstall the program, it says firewall detected and that I am not authorised to remove(!).
Please guide.

Hello Indrani,
We apologize for the inconvenience.
This issue can happen, if the older version of AVG Internet Security installed in your computer We suggest you to remove the old traces of AVG from your computer and install the latest version. Use this link to download and run the AVG remover tool http://download.avg.com/filedir/util/AVG_Remover.exe
Note: Once the removal of AVG is complete, go to C Drive and delete the AVG remover folder. After which you can install AVG Internet Security latest version from this link http://files-download.avg.com/inst/mp/AVG_Internet_Security_742.exe.
Thank you