This install has been painful:
1. Avast 5.0 installed over 4.8. I didn't know you needed to uninstall 4.8 until I started reading postings here after all the trouble I've had.
2. Avast wasn't running it's services. Had to register, but the "register now" button only brought up "choose services" page. After clicking on Free Home, nothing....
3. Registered at avast.com and got the license key in email.
4. Copied the license key, and tried to insert it. Avast error message "The system can't find the file specified."
5. Came out here, read that I needed to uninstall avast using the clear tool. Downloaded that, ran it in safe mode, had to reboot computer a few times to get it stable.
6. Re-downloaded latest version from cnet--5.0.418 I think...
7. Installed, and still getting error message from step 4. Also replay of behavior in step 2.
Any ideas? All I can think of is going back to 4.8....