Hi, I’m currently using Avast 4.8 Home and experiencing 2 problems :
There are 14 On-Access Protection, which is the 7 (IM, Mail, Network, Outlook, Standard, Web and P2P) protection that are working and also 7 “copies” (i.e IM, Mail, Outlook, etc.) that cannot be selected.
The Customize option for each of the protection cannot be opened. A “Access is denied : The operation could not be completed” window appear instead.
Your installation is most certainly messed up with duplicate providers.
A clean reinstall is the best option.
Download the latest version of avast http://www.avast.com/eng/download-avast-home.html and save it to your HDD, somewhere you can find it again. Use that when you reinstall.
Download the avast! Uninstall Utility, find it here and save it to your HDD.
Now uninstall (using add remove programs), reboot, run the avast! Uninstall Utility, reboot, install the latest version, reboot.