Unknow email error, is it malware?

[killer bee]

Today after i plug my sister pen driver to the PC, Norton Internet security 2012 detected 46 malwares. After delete all of them, my PC automatically reboot ( not done Norton or myself). But now every time i receive email error warring. I use Outlook, but i don't have yahoo mail, but this error warning display it try to send mail from Yahoo account. Moreover i can't visit security software developer sites, such as Norton, Kaspersky. I receive "Server not found" error, but my internet connection OK.

Error screenshot:- http://4.bp.blogspot.com/-GbCWqDERxKA/UDDuLpAPhBI/AAAAAAAAFJQ/Jrln6raKROE/s1600/2012-08-19_1854.png

Note:- i can't upload images to seven forum.

Is it a malware? Now i'm going to format my PC and reinstall Windows7.

 

[Jacee]

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[codyw]

That IS strange! I would recommend booting into safe mode with networking, and try and download a free trial of Kaspersky. It almost sounds like you may have an infection. I used to use Norton a long time ago on my first PC (it was the 2011 version). That was a big mistake because overtime, my PC slowed down and I couldn't figure out why. Everything I scanned with came back clean. I installed a free trial of Trend Micro Titanium and it found 101 pieces of Spyware. Since that, I have been a Kaspersky user. I am very curious to see what kind of results you get.