Microsoft Security Essentials -

I have Windows 7 home premium and have been using Microsoft security essentials.  Full scan every other day.  the program has  never found a problem.... so I thought everything was o.k.  Last week my pc was blasted with spyware, viruses, Trojans, and something called Trovi....... I used Malwarebytes  great download. It picked up over 350 viruses and Trojans. I can't figure out why Microsoft Security Essentials did not stop these viruses, etc.   But allows them to go through, my pc was trashed!  Majorly trashed.  It still isn't working right.  Anyone know anything about this program?  Thanks
 

Question Info


Last updated November 7, 2018 Views 2,489 Applies to:
Answer

Trovi is considered a potentially unwanted progam (PUP) Microsoft antimalware products do not deal with these types of software the same as other antimalware products such as Malwarebytes.

How Microsoft antimalware products identify potentially unwanted software
http://www.microsoft.com/security/portal/mmpc/shared/objectivecriteria.aspx

Malwarebytes Adopts Aggressive PUP Policy
http://blog.malwarebytes.org/news/2013/07/malwarebytes-adopts-aggressive-pup-policy/

However this should change in July 2014.

Adware: A new approach
http://blogs.technet.com/b/mmpc/archive/2014/04/03/adware-a-new-approach.aspx

As you noted, Malwarebytes [1] does well in detecting and removing various types of malware, but in some instances additional tools may be required, such would be the case with Trovi. Please refer to the following removal guide:

How to remove Trovi Search (Virus Removal Guide)
http://malwaretips.com/blogs/trovi-search-removal/

These types of software are often bundled with other legitimate software and are installed sometimes without being obvious or because a person tends to rush through an installtion without looking for unexpected optional software. This not applies to new software that you may download, but also software updates for programs already on your computer. Even familiar products such as Adobe Flash Player and Java come with optional components that most would avoid.

  

[1] When Malwarebytes encounters a large number of malware, such as in your case, you should continue scanning until no detections are made and possibly use another second opinion on-demand scanner as well, possibly HitmanPro, Kaspersky Virus Removal Tool, or ESET Online Scanner.

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