Avg error 0xc0070643 event exec_finished

Hello Pierluigi,
We apologize for the inconvenience caused.
We understand how something like this will try your patience.
Mostly this error is occur due to anyother Antivirus program or previously installed AVG on your system.
Is there any other Antivirus program or AVG program installed on your system? If so, please uninstall it and try to install AVG Antivirus free
Thank you.

Pierluigi,
Sorry for the inconvenience caused.
We would request you to run AVG remover tool to completely remove AVG and then re install it.  
Please  click this link http://download.avg.com/filedir/util/AVG_Remover.exe to download and run the AVG Remover tool.
1. Please select the AVG products which are shown in the remover tool window and then start removal process.
2. After the remover tool process is successfully finished, restart your computer.
3. After the restart,  manually delete the AVG Remover folder in the C drive of My computer.
To reinstall please follow the article http://avgclick.me/InstallFree .
Please feel free to get back to us for further assistance.
Thank you.

Hello,
I'm using windows 7 on my laptop. I installed AVG Antivirus Free and I got the error 0xc0070643 event exec_finished, so I used your AVG Remover. After that I tried to install AVG Antivirus Free again but I got the same error. 
I hope to receive support from you soon.

Pierluigi Spinelli

Hello Pierluigi,
We apologize for the inconvenience caused.
We understand how something like this will try your patience.
Mostly this error is occur due to anyother Antivirus program or previously installed AVG on your system.
Is there any other Antivirus program or AVG program installed on your system? If so, please uninstall it and try to install AVG Antivirus free
Thank you.
Gulam,
AVG Remover didn't find any active AVG product within my system.