AvastUI.exe - Application Error (number inside) Cannot uninstall, cannot launch

When avast updated itself I lost all internet connection. So I did a repair. When it rebooted I had this error

"The exception unknown software exception (0xc06d007f)
occurred in the application at loaction 0x759bc41f.

This error will not go away. I cannot launch avast, I cannot uninstall anything. I tried changing it that did nothing.

It seems to be running though windows turned it on for me.

I have uninstalled all other antivirus but I don’t think the wondows one iuninstalled all the way. After I installed
this I had a notice it wanted to run. But I don’t have the program to run it. It is listed under avast. I don’t
know how to get it out of my computer I only want avast.

Also windows fire wall started up even though I am using avast’s firewall as a pro user.

Thanks for help fixing this. At least I have internet access.

BTW this is not the first time avast acted this way. I had to operate without it for awhile back in 2012 because it
was doing similar things.

i used instructions here http://forum.avast.com/index.php?topic=148752.0 and reinstalled. some are claimimg its currupting network settings, others saying update kills internet.
Same experience for me. i hope this is rectified for windows 7 64 bit

I have the same error (16 March 2015)