vista computer blocking sending emails being sent thru outlook web access powered by exchange server

vista computer is blocking sending emails being sent thru outlook web access powered by exchange server.  There were multiple viruses that have been cleaned up and the computer works fine otherwise but when you try to access their outlook web access account, you can view but when you try to reply or send an email, the action times out with an error code of  0x800705

Prior to last week, the user could send and reply but they called to get their computer fixed when the access stopped.  I cleaned up the viruses and Panda AV 2010 shows no more viruses.  I also ran the microsoft free scanner through live one care and got the registry errors down to 5 but it won't clean up the last 5.  I don't know if that's relational but we still can't send.  How do I disable the active X or whatever is causing this timeout to occur?

I have the settings set to protected mode off, medium security, enabled signed active x and put the site into the trusted sites.  Still no luck.  What am I missing here?

The user never made their CD to do recovery, so that's not an option st the moment.
KPMcCordAsked:
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JohnBusiness Consultant (Owner)Commented:
More than likely, malware remains. Once a significant case of malware takes root, it is really difficult to get rid of it, and one or two tools just will not do the job. Some persons have success with Malwarebytes and Combofix. I suggest you check these out and try them and if that fails (a distinct possibility), then reimaging may be the only final remedy. ... Thinkpads_User
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KPMcCordAuthor Commented:
I have used malwarebytes also.  I will try combofix & let you know
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KPMcCordAuthor Commented:
I ended up having to reimage the drive and reinstall the programs.  Malwarebytes and Combofix cleaned up the viruses but couldn't put the system files back that had corrupted.   Thanks
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JohnBusiness Consultant (Owner)Commented:
Thank you and thanks for the update. ... Thinkpads_User
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