O firefox está instalado, mas apresenta mensagem dizendo que os atalhos não existem mais. Reinstalei, fiz acertos conforme site indica, mas depois some de novo.

O firefox começou a apresentar erros, então desinstalei e fiz o download novamente. Quando reinstalado, ele não entrava em vários sites, como facebook e até mesmo o site de support do mozilla. Segui as dicas do support e acertei esse erro e ele voltou a funcionar normalmente. No entanto, cerca de 1hora depois, quando cliquei no atalho, apareceu informação de erro, como se o programa tivesse sido desinstalado. Mas o programa continua instalado, a pasta intacta e com acesso ativo e liberado.
Já repeti esse processo várias vezes, mas continua acontecendo isso.

Às vezez um problema com o seu Firefox pode estar relacionado a um Malware instalado em seu computador, que você pode não estar ciente.
Você pode tentar estes programas gratuitos para fazer a varredura do malware, que funcionam com o software antivírus existente:
* [http://www.microsoft.com/security/scanner/default.aspx Microsoft Safety Scanner]
* [http://www.malwarebytes.org/products/malwarebytes_free/ MalwareBytes' Anti-Malware]
* [http://support.kaspersky.com/viruses/disinfection/5350 Anti-Rootkit Utility - TDSSKiller]
* [http://general-changelog-team.fr/en/downloads/viewdownload/20-outils-de-xplode/2-adwcleaner AdwCleaner] (for more info, see this [http://www.bleepingcomputer.com/download/adwcleaner/ alternate AdwCleaner download page])
* [http://www.surfright.nl/en/hitmanpro/ Hitman Pro]
* [http://www.eset.com/us/online-scanner/ ESET Online Scanner]
[http://windows.microsoft.com/MSE Microsoft Security Essentials] é um bom antivírus disponível para Windows 7/Vista/XP, se você já não tiver um.
Mais informações podem ser encontradas nesse artigo: [[Troubleshoot Firefox issues caused by malware]].
Por favor informe-nos se isso resolveu o problema!

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