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Trojan dropper on opening any IE window by almmj


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Type: Bug
ID: 795346
Opened: 7/30/2013 3:18:39 AM
Access Restriction: Public
User(s) can reproduce this bug


Every time I open Internet Explorer, or a new tab of IE, a Trojan Dropper is detected by Microsoft Security Essentials (and is therefore quarantined).

From MSE -


Category: Trojan Dropper

Description: This program is dangerous and installs other programs.

Recommended action: Remove this software immediately.

file:C:\Users\User\AppData\Local\Microsoft\Windows\Temporary Internet Files\Virtualized\C\Users\User\AppData\Roaming\MCommon\WindowsLiveUpdate.exe
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Posted by Microsoft on 9/20/2013 at 2:40 PM
Hi almmj,

It appears that your PC is affected by a trojan attack. Perhaps you could try running Microsoft Security Essentials and click on "Clean computer" within the home tab of the program. That should help remove any quarantined virus/trojan/malware. Try and see if it helps.

Refer to the last image on this page: http://www.microsoft.com/security/pc-security/mse.aspx

Jay Hong (on the IE team)
Posted by Microsoft on 8/1/2013 at 12:37 PM
Thank you for your feedback. This issue is currently caused by issues external to Internet Explorer.

It looks like you have a Trojan attached to your browser. You need to completely remove it before starting IE again.

If you still believe the problem is due to Internet Explorer, please file a new feedback with additional information.

Best regards,

The Internet Explorer Team
Posted by Microsoft on 8/1/2013 at 12:36 PM
Thank you for your feedback. We will be investigating this issue further.

Best regards,

The Internet Explorer Team
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File Name Submitted By Submitted On File Size  
screenshot trojan dropper.jpg 7/30/2013 109 KB