Hi,
I came across the same issue yesterday but have since resolved it. try
downloading spybot to remove any reminisce of harmful scripts, programs etc.
The one that stuck out most obvious on my scan was Win32.DNSChanger.axi.
Since you aren't able to connect to windows update and are being redirected
its safe to assume that the dns address is at fault, causing even some
anti-virus programs not to update properly.
Through the cmd prompt type in ipconfig /all and review your dns server
making sure that it is indeed the server you previously had set. To be sure
of this- if you have an additional computer set up on a network key in the
same command on the computer that is not infected. Note down what the dns
server is. below will help in configuring that.
You might be surprised that all it was- was the dns server issue which could
be easily resolved by entering into the connection type properties through
your network connections, right click, properties, then scroll down to
tcp/ip, click properties, click use the following dns addresses, then key in
the correct one as per what the real dns server is after verifying on another
computer on your network which has not been infected. Don't worry about the
alternate dns server you won't need it.
hopefully this helps

. If not I'll try and clarify a bit more if need be.
sorry

not too good at explaining I normally just do it to avoid the
headaches.
"Ana" wrote:
> Hi,
>
> I have a problem with Windows Updates. I get automatically redirected to
> msn.com. I also cannot download pretty much anything else from microsoft.
> I found some sites saying it could be a virus called Vundo but I don't have
> any popups or registry key entries typically associated with that virus. I
> ran AVG, Symantec, trendMicro and Microsoft's own online scan. None of them
> picked up any viruses or spyware.
> Someone else suggested that it may be a problem with one of the windows
> updates I installed previously (they weren't specific on which one though). I
> currently have Service Pack 3.
>
> Any suggestions. Thanks.
>