Error message ....avgsysx.fmw.1.dill not designed for Windows or contains an error

I have tried to remove AVG manually and using the removal tool. Neither works and a similar error message intervenes. Any help would be much appreciated.

Hello Rosamund,
We are sorry to know that you are unable to uninstall AVG. In this case, we suggest you to restart the computer in safe mode with networking(http://avgclick.me/rebootintosafemode) and see if that fix the issue.
Thank you