avast! Free Antivirus 5.1.889.0 travando o PC

Olá! Eu tive que desinstalar o avast! Free Antivirus 5.1.889.0 do meu pc porque quando eu fiz a instalação e a configuração dele o meu pc desligou normalmente mas na hora de reiniciar ele travou os ícones da área de trabalho e não estabilizou e ainda ficou me pedindo para esperar, tive que reiniciar no modo de segurança e desinstala-lô e só aì eu consegui reiniciar o pc
normalmente. Alguém sabe me dizer o que está acontecendo?

Portuguese to English translation
Hello! I had to uninstall avast! Free Antivirus 5.1.889.0 on my pc because when I did the installation and setup my pc hung it normally but when rebooting it crashed the icons on the desktop and not yet stabilized and was asking me to wait, had to restart in Safe mode and uninstall it and then I could just restart the pc
normally. Someone can tell me what’s going on?
http://translate.google.com/#auto|en|Olá!%20Eu%20tive%20que%20desinstalar%20o%20avast!%20Free%20Antivirus%205.1.889.0%20do%20meu%20pc%20porque%20quando%20eu%20fiz%

Please see:
avast!WEBforum | avast! support forums | International zone | Português
http://forum.avast.com/index.php?board=27.0

Which was your old antivirus before avast 5.1?
Any other security program that could interfere?

Os antivírus anteriores eram o avast! 4.8… e depois o 5.0… mas esse problema vem me ocorrendo com a versão 5.1… em diante!

I suggest an installation from 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. If, for any reason, you did not solve, try doing the step 3 in Safe Mode anyway.