I have a problems with avast 5

[Morgot]

Before I use avast 4 free edition and i was glad of it.
Then I bought new avast 5 and installed it but after installation when I click on start menu button it cant show up  windows menu .After uninstall  and reinstall i have the same problem with start button and even I cant enable avast 5!

Please help:)

[Lisandro]

Strange... I can't see any correlation... Anyway, I suggest an installation from the scratch:

1. Download the latest version of avast! Uninstall Utility and save it.
2. Download the latest avast! version and save it.
3. Uninstall avast from Control Panel (if possible). If, for any reason, you can't run it, try booting in Safe Mode and doing it from there. Anyway, boot after that.
4. Run the avast! Uninstall Utility saved on 1. If, for any reason, you can't run it, try booting in Safe Mode and doing it from there. Anyway, boot after you've run it.
5. Install avast! using the setup saved on 2. Boot.
6. Register your free copy or add the license key for Pro.
7. Check and post the results.