Can't change anything

Hello, I write in regards of a problem I've been having for a while. I can't change my settings in avg,. I tried reinstalling and running as administrator but I still get an error saying Details can be found in the notification column, specified file was not found. Is there any way I can fix this issue?

Hello Kelvin,
We apologize for the inconvenience caused to you. Could you please let us know which version of AVG are you using and whether it is AVG Internet security or AVG PC Tuneup you are trying to save the changes? Thank you.