I appear to have been infected by a Bot (?) that sends out Spam from my PC bypassing my email client (Outlook 2016). As a result Spamhause has blocked my IP address and despite trying to locate and eliminate the Bot - or whatever it is, nothing has worked and my IP address gets blocked again and again. I have run 4 virus detection programmes - Malwarebytes, AVG Pro, McAfee Stinger and Norton NPE a number of times, but none of them have managed to locate the infection. I have NAT enabled on my router, but nothing I have found so far stops this infuriating problem. One suggestion from Spamhause is to block access to Port 25, but I can find no way of doing this on my router or PC. Can anyone suggest how this can be accomplished or suggest any other solution before I go completely mad.

Thanks