Question : Outlook 2007/Mozilla Thunderbird Cannot Connect to Email Server

After removing some trojans from a windows 7 64 bit computer Outlook 2007 stopped receiving emails, giving me this error.

error(0x80040900): 'the server name you entered can
not be found on the network (it might be down temporarily)

I have tried the following things:
A system restore to before the virus cleanup
resetting up the email accounts
setting up the email accounts on a different machine (this worked fine)
setting up a different email client (mozilla thunderbird was also unable to get mail for ANY account i set up)
Uninstalling the antivirus
turning off the firewall

I'm trying to find a solution that doesnt involve reinstalling the operating system.  Can anyone help?

Answer : Outlook 2007/Mozilla Thunderbird Cannot Connect to Email Server

I was able to access the internet through the browser, but not the email account. The mail server was not pingable, so I couldn't get a reply. However, I was able to set up this account on another PC successfully, which told me it was something about THIS pc that was prohibiting sending and receiving.  The fix was a resetting the WINSOCK. In DOS command line I entered these two lines and it was fixed after reboot:
netsh winsock reset <enter>
netsh int ip reset reset.log <enter>

It was funny, I had never seen this problem that effected only email without effecting the browser.  This definitely fixed the problem though.