Installation Problem showing Error code: 0xC0070643

Hello Pradipta,
I apologize for the inconvenience caused while installing AVG. Have you tried uninstall AVG using AVG remover tool? If not, please try uninstall AVG using AVG remover tool and start a fresh installation of AVG Internet Security again.
Please run AVG remover tool based on your OS (32-bit or 64-bit) to completely remove AVG and then re install. To determine whether your OS is a 32-bit or 64-bit, please click on this link. http://support.microsoft.com/en-us/kb/827218

To download AVG Remover tool for 32-bit: http://download.avg.com/filedir/util/support/avg_remover_stf_x86_2015_5501.exe
To download AVG Remover tool for 64-bit: http://download.avg.com/filedir/util/support/avg_remover_stf_x64_2015_5501.exe
Please run the AVG installation again. To download, install and activate AVG Internet Security program please follow the instructions mentioned in the following article: http://bit.ly/1DXPL5z .
Please feel free to contact us for any further assistance.
Thank you.

I tried the AVG Internet Security software since last May'2015 & it was working. But yesterday I noticed that it was showing  the Free AVG Antivirus version instead of AVG Internet Security. I thought to uninstall & again tried to install. While installing I faced the problem as the installation was not completed and  the message noticed is :- Error code: 0xC0070643
Description: Event exec_finished
Please do the needful at the earliest in order to save my system as I have to do lot of online job. I have Team Viewer7 so you can do it online. Just inform me when you will have time. my contact No. 09437234348.
Expecting an early response at your end.
Thanks
P.K.Panigrahi, Mob. No. 09437234348

Hello Pradipta,
I apologize for the inconvenience caused while installing AVG. Have you tried uninstall AVG using AVG remover tool? If not, please try uninstall AVG using AVG remover tool and start a fresh installation of AVG Internet Security again.
Please run AVG remover tool based on your OS (32-bit or 64-bit) to completely remove AVG and then re install. To determine whether your OS is a 32-bit or 64-bit, please click on this link. http://support.microsoft.com/en-us/kb/827218

To download AVG Remover tool for 32-bit: http://download.avg.com/filedir/util/support/avg_remover_stf_x86_2015_5501.exe
To download AVG Remover tool for 64-bit: http://download.avg.com/filedir/util/support/avg_remover_stf_x64_2015_5501.exe
Please run the AVG installation again. To download, install and activate AVG Internet Security program please follow the instructions mentioned in the following article: http://bit.ly/1DXPL5z .
Please feel free to contact us for any further assistance.
Thank you.