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Steve_BradyFlag for United States of America

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Questions regarding a possible virus infection

Hello,

I'm wondering if the following scenario is indicative of my system being infected by some type of virus or parasite or having some other type of issue of concern.

I sent an e-mail message to a friend through MS Outlook (2010) but included no Cc's or Bc's.  A while later I got a message saying:

Delivery Status Notification (Failure)

This is an automatically generated Delivery Status Notification.

Delivery to the following recipients failed.

       s.arafat070@yahoo.com


However, that e-mail address is not the address of my intended recipient and in fact is not in my e-mail address directory and is completely unfamiliar to me.  Interestingly, I did a system search for "s.arafat070" and it turned out two results, both of which were also bounce backs but from e-mails I sent almost a year several months ago.  Even more curious is that this particular friend was a recipient on both of those messages (one as part of a distribution list iand the other as a single cc).

In case it is helpful, here is the content of the text file attached to the bounce back message:

Reporting-MTA: dns;col0-omc3-s2.col0.hotmail.com
Received-From-MTA: dns;COL0-MC1-F4.Col0.hotmail.com
Arrival-Date: Thu, 24 May 2012 21:08:17 -0700

Final-Recipient: rfc822;s.arafat070@yahoo.com
Action: failed
Status: 5.5.0
Diagnostic-Code: smtp;554 delivery error: dd This user doesn't have a yahoo.com account (s.arafat070@yahoo.com) [-5] - mta1458.mail.mud.yahoo.com


Questions:

1) Do these circumstances suggest an infection of either my friend's system or mine?

2) Is it possible/likely that messages I'm sending are going to unintended recipients and I just don't know about it because they are not bouncing back?

3) I have Kaspersky anti-virus Version 2011 but at the time I sent this e-mail, it was disabled because it slows down my Dragon NaturallySpeaking (DNS) voice recognition application.  Should I not Send/Receive e-mails when it is disabled?

4) What is the best fix if a fix is needed?

Thanks

My specs FYI:
•Processor: AMD Phenom(tm) II X6 1090T Processor 3.20 GHz
•Memory: 16.0 GB
•Operating System: Windows 7 Ultimate (64-bit)
•Drive C: Crucial 128GB SATA 6.0Gbps/2.5-inch Solid State Drive (CTFDDAC128MAG-1G1)
•Drive D: LG 12x SATA Blu-ray Writer Drive (WH12LS30K)
•Drive E: WD 500GB SATA 6.0Gbps/7200RPM/16MB/3.5-inch Internal HD (WD5000AAKX-001CA0)
•Drive F: Hitachi 1TB SATA 3.0Gbps/7200RPM/32MB/3.5-inch Internal HD (HDS721010CLA332)
•Drive G: Seagate 3TB SATA 6.0Gbps/7200RPM/64MB/3.5-inch Internal HD (ST3000DM001-9YN166)
•Video: ATI Radeon HD 5700 Series
•MS Office 2010
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Great responses. Thanks.