Upgrading AVG protection

Hello Edward,
We regret for the inconvenience caused. Please run the  AVG remover tool : http://aa-download.avg.com/filedir/util/AVG_Remover.exe to completely uninstall your previous installation of AVG program from your PC. Once uninstalled please follow the instructions on the article http://avgread.me/1FKGRZI to reinstall your AVG program.
Thank you.

I'm having trouble upgrading from AVG free to the paid version. Each time i tried to install it came with error code 0xc007001d. 

I've tried rebooting the PC & trying again but was unsuccessful. I then uninstalled the free version to try from scratch & got the same message. I also get the same error when i try to install the free version again so currently my PC is unprotected.

How can I resolve this error?

Hello Edward,
Thank you for replying us back. We have sent you an email containing the instructions to have a better assistance in fixing the issue. Please feel free to contact us for further assistance.
Thank you.