CCleaner has the ability to enable, delete or disable startup programs (including of browsers) in Windows, some Avast users on 64-bit Windows 7 getting ‘access denied’ errors whey trying to do those things even though they’re logged in and running program with administrator privileges.

Errors experienced by some users are: ‘Failed to delete startup item: Access is denied.’  and ‘Failed to enable/disable startup :Access is denied’. Former error appears when user tries to delete startup item using CCleaner from Startup section in it and latter happens when user tries enable or disable a startup item.

.CCleaner Startup section

Fix or workarounds to stop Access Denied Errors for CCleaner with Avast

You can use msconfig to manage startup items, open Run command and type msconfig and press enter. Or try this way- disable Avast Selft Protection module and use CCleaner.

To do this in Avast Free Antivirus 2014 

open Avast user interface> Settings>Troubleshooting remove tick mark for "Enable avast! self-defense module’ and click ‘OK’ to apply the changes.

After using CCleaner, re-enable Self-defense module which protects important files in Windows  from being modified or deleted by malware or other programs.

Avast has acknowledged the issue and promises the fix in next update.

Are you getting these errors with Avast for CCleaner? Share with us in comments.