How to find a deep embedded virus that virus scanners can't pick up?

I have tried everything that I can think of and I can't figure it out. Something is slow down my system, and on top of that I keep getting the message that my Windows 7 build 7600 is not genunine. Also in the past 3 wks I have restored my factory settings twice each time it has reinstalled a virus. To clear them off I used AVG Internet Sercurity 2013, I have cleaned out my temp files, cleaned my registry, used NPE, used cmd commands SFC /scannow, attrib, dir, and chkdsk. And I even downloaded IObit to recheck everything. Any suggestions?  

Have you contacted AVG support?

Are both AVG and IOBit installed? That would be a bad thing:

You should never have more than one security product installed on the PC providing active protection/scanning. This can cause performance issues, system instability, and can hinder the effectiveness of both products at providing protection.


Restoring to Factory will not "reinstall a virus" as the factory restore partition is typically protected from being updated,


Upon Restore, did you activate Windows? have you contacted your PC maker regarding the activation issue?


If you still believe that this is due to an infection --

Try Hitman Pro Trial Version: This program may be run from a flash drive.


Try TDSS Killer: TDSS Killer may be run from a flash drive.


You may wish to download (on an uninfected PC) one or more of the following rescue scanners to create bootable media to scan the infected PC (list courtesy of forum member, GreginMich):

Each rescue scanner will miss things – because none of them will have a perfectly complete and up-to-date set of definitions; so you might need to use several of these rescue scanners, or something like the Shardana Antivirus Rescue Disk Utility, which creates a custom bootable CD or flash drive that includes multiple rescue scanners: -- be sure to decline all of the additional junk being offered when you install the download for SARDU. I tested this install recently and the first offer was for the hated and difficult to remove Delta Search Toolbar.

Another boot CD (similar to Shardana) to consider is Hiren's Boot CD.

You can also  start here - and select the link that says - I think my computer is infected. Options will vary by region, but phone support leads you to Microsoft Answer Desk ( in the US at this time. After an initial free consultation, a fee will be charged for assistance, based on the details of the case.

This web site - contains details for many of the common infections, often immediately after they began to appear in the wild, and instructions are provided for how to remove the infections using their malware removal guides. They also have forums where you can seek help from people who specialize in malware removal.

This may also be helpful - How to get rid of malware:



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Last updated October 2, 2020 Views 4,125 Applies to: