I have recently started using Ubuntu 13.04. The other day I found the Firefox browser blocked by malware. The website was from Europol and said that it had blocked the browser and that 'everything' had been encrypted. have uninstalled Firefox. I can still access files but I was wondering how I can eradicate this malware from my laptop. I have tried to install ClamAV, it did not work but the 2 do not have to be related.