Error code:0xc0070643

Hello Ivan,
We understand how disappointing this could be. We would  request you to run AVG remover tool (http://aa-download.avg.com/filedir/util/AVG_Remover.exe) to completely remove AVG and then re install. Please click on the following link to reinstall AVG on your computer (http://support.avg.com/SupportArticleView?urlname=How-to-reinstall-AVG).
Thank You. Please feel free to contact us for any further assistance.

Hi, I had some problem with my computer on Win 8.1. I uninstalled AVG and then when i try to reinstall AVG, i received this error:
"An unkown issue has prevented Internet Security from installing
Please give it another try, and if this issue persists, contact our friendly suport team and give them this error code:0xc0070643.

I have tried installing more than once, still the same message.

Hello Ivan,
We understand how disappointing this could be. We would  request you to run AVG remover tool (http://aa-download.avg.com/filedir/util/AVG_Remover.exe) to completely remove AVG and then re install. Please click on the following link to reinstall AVG on your computer (http://support.avg.com/SupportArticleView?urlname=How-to-reinstall-AVG).
Thank You. Please feel free to contact us for any further assistance.