https://support.avg.com/answers?id=906b00000008ufS

Hello Tine,
Thank you for the information provided. We would like to inform you that the AVG installation package is able to detect conflicting anti-virus products that may prevent some AVG components from functioning correctly. If a conflicting program is detected, it must be uninstalled before installing AVG. Also, please try to keep the whole conversation in one question/thread to speed up resolution. Thank you for understanding.
Thank you. Please feel free to contact us for any further assistance.

this is my cage nr…I cant find my dialog with you
error 0xc0070643 i current no madder what I do…I have followed the link you gave me on mail to the edge…I have removed all old and so on…this i a new pc, where you have free mcfee the first too month…does that matter…

Tine, Also see your other posting (https://support.avg.com/answers?id=906b00000008ufmAAA). McAfee… Download & run the McAfee total removal tool… (http://download.mcafee.com/products/licensed/cust_support_patches/MCPR.exe).
AVG Guru

Hello Tine,
Thank you for the information provided. We would like to inform you that the AVG installation package is able to detect conflicting anti-virus products that may prevent some AVG components from functioning correctly. If a conflicting program is detected, it must be uninstalled before installing AVG. Also, please try to keep the whole conversation in one question/thread to speed up resolution. Thank you for understanding.
Thank you. Please feel free to contact us for any further assistance.