Thanks for the response. I have not set CC to clean AVG as I didn't delve that far into the CC settings. I did save the helper app and instructions for it.
When I first searched the AVG website for data regarding the CTF file I used the website's main search engine. Nothing shows up via that route. When I returned to the website today I input the error text into the FAQs search engine and I found the helper app.
Through your comments I feel somewhat relieved to know I am not alone in dealing with this glitch. And as you say, it is easy to rectify now that I know how.
AVG antivirus: "Invalid update control CTF file"
in CCleaner Bug Reporting
Posted
check this out, (http://www.strategyonline.co.za/blog/?p=876), i been bothered so long for this issue..and the suggestion is really help