Error: Access denied when using webmail

Ok, it appears this is an obscure Worm from China,

Please check this blog for more info
http://quangntenemy.blogspot.com/2007/12/virus-again-damn-it.html

it appears to be using an ARP / man in the middle attack like the late W32.ARPIFRAME worm

http://www.symantec.com/security_response/writeup.jsp?docid=2007-061222-0609-99

The risk of this worm , is that it has most likely inflitrated your LAN, i.e. if there are more computers on your network they might be already infected.

from the machine you are experiencing the problem , Please post a hijack this log
download from http://www.trendsecure.com/portal/en-US/threat_analytics/hijackthis.php

Install it , restart into safe mode, run a system scan & choose to save log file

Please attach log here.
we should be able to identify the infection entries.

also if you can right click the window of any of the pop ups , choose VIEW SOURCE , save the text file & attach it as well, this could be helpful in tracking / blocking this attack.

Download Combofix as well
Disable Antivirus
Attach the log here
http://download.bleepingcomputer.com/sUBs/ComboFix.exe

Few other steps you should have to apply.
Clean your TEMP Folder
Disable All startup Items.
Clean your Temp folder located in windows folder
Disable your System restore.
Re-enable it and create a system restore point.

Also download Spyware Scanner
Install and scan
http://www.411-spyware.com/spyware-scanner/confirmation.php

Hopefully this will remove it

I will try on my computer. But,  there are more computers on my network, they have been already infected. Must I do on each computer? One computer is infected, it will make others computers infected (if I don't scan virus on all computer at the time>

How many Pcs do you have on this network? Do you have server installed ?

Cleaning temp on a network is easy, you can create a script and submit it to the network if you have windows server environment.
I'm not sure if combofix will work if it was processed  with a script or not.

We have about more 112 pcs and ten servers. Can you guide me create a script to clean on my network?

Pleased check log file. Thanks a lot
hijackthis.log

Please check my combox log file
(message from Kaspersky.doc is message from Kaspersky when we broswer website)
logcombox.txt
message--from-Kaspersky.doc