It appears that my machine is being used to send spam, first time for everything; am listed on the following DNS-based blocklists:
When attempting to send mail from Outlook, the following message is returned (sensitive info replaced with ALL CAPS):
The TCP/IP connection was unexpectedly terminated by the server. Server Response: '554 Your connection from NNN.NNN.NNN.NNN has been rejected due to poor reputation.'. (Account: 'ACCOUNTNAME', SMTP Server: 'mail.DOMAINNAME.com', Error Number: 0x800ccc0f).
Have AVG and Malwarebytes, both up to date. XP Home, SP 3, up to date.
Performed scans and computer "appears" to be cleaned. Have been struggling with malware for about 2 months.
Wish to ensure all malware is expunged.
New user, not sure where to start, need assistance.