have problems with paid avast...

I paid for avast and down loaded it…
But now it says I’m " unsecured"
I hit the “fix now” button,
and get a box that say " if you started this program continue"
i hit “ok”
then another box pops up saying " user account controls helps stops unauthorized changes to your computer"
and doesn’t let me turn on Avast ???
any clues or help ?? I have windows vista on a Compaq computer.
Is there a fire wall stopping me ?
I used the free version for a year without any problems.
But with this paided version I’m having problems ???
any help…

You’ve posted in the PDA version forum…

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.