BleepingComputer.com: ComboFix and AVG

ComboFix will not run on a PC that has Avg installed. Is there a way to make it work besides uninstalling AVG?

ComboFix will not run until AVG is uninstalled as a protective measure against the anti-virus. This is because AVG "falsely" detects ComboFix (or its embedded files) as a threat and may remove these files resulting in the tool not working correctly which in turn can cause damaging or "unpredictable results". This is an issue with AVG and since it cannot be effectively disabled before running ComboFix, the author recommends users to uninstall AVG first in order to avoid any possible issues.

AVG also has issues with other security tools like Malwarebytes' Anti-Malware. Please read Section H here. Related discussions at AVG:

• AVG 2011 Free vs. Malwarebytes
  
• AVG 2011 Resident Shield - File Exclude List Feature Removed

Further, no one should be using ComboFix unless specifically instructed to do so by a Malware Removal Expert who can interpret the logs. It is a powerful tool intended by its creator to be "used under the guidance and supervision of an expert. Using this tool incorrectly could lead to disastrous problems with your operating system such as preventing it from ever starting again. When issues arise due to complex malware infections, false detections, problems running ComboFix or with other security tools causing conflicts, experts are usually aware of them and can advise what should or should not be done while providing individual assistance. Those attempting to use ComboFix on their own do not have such information and are at risk when running the tool in an unsupervised environment. Please read the pinned topic ComboFix usage, Questions, Help? - Look here.