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11 May 2018
Infection Length:
My Defragmenter
Risk Impact:
Systems Affected:


PUA.MyDefragmenter is a potentially unwanted application that installs adware without the user's consent.

Antivirus Protection Dates

  • Initial Rapid Release version 10 May 2018 revision 005
  • Latest Rapid Release version 10 May 2018 revision 007
  • Initial Daily Certified version 10 May 2018 revision 017
  • Latest Daily Certified version 10 May 2018 revision 017
  • Initial Weekly Certified release date 16 May 2018
Click here for a more detailed description of Rapid Release and Daily Certified virus definitions.
Once executed, the application creates the following folders:
  • %ProgramFiles%\ConsumerSoft
  • %ProgramFiles%\ConsumerSoft\My Defragmenter
  • %AllUsersProfile%\Administrator\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\My Defragmenter

The application creates the following files:
  • %AllUsersProfile%\Administrator\Desktop\My Defragmenter.lnk
  • %AllUsersProfile%\Administrator\Desktop\My Phone Support.lnk
  • %ProgramFiles%\ConsumerSoft\My Defragmenter\config
  • %ProgramFiles%\ConsumerSoft\My Defragmenter\Defrag.exe
  • %ProgramFiles%\ConsumerSoft\My Defragmenter\DefragReminder.exe
  • %ProgramFiles%\ConsumerSoft\My Defragmenter\drconfig
  • %ProgramFiles%\ConsumerSoft\My Defragmenter\eula.txt
  • %ProgramFiles%\ConsumerSoft\My Defragmenter\INSTALL.LOG
  • %ProgramFiles%\ConsumerSoft\My Defragmenter\install.sss
  • %ProgramFiles%\ConsumerSoft\My Defragmenter\MyPhoneSupport.exe
  • %ProgramFiles%\ConsumerSoft\My Defragmenter\schd
  • %ProgramFiles%\ConsumerSoft\My Defragmenter\udefrag-kernel.dll
  • %ProgramFiles%\ConsumerSoft\My Defragmenter\udefrag.dll
  • %ProgramFiles%\ConsumerSoft\My Defragmenter\Uninstall.exe
  • %ProgramFiles%\ConsumerSoft\My Defragmenter\zenwinx.dll

Next, the application creates the following registry entries:
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{91566393-AD20-4B92-A81B-B17F31527DD4}\"" = ""
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{91566393-AD20-4B92-A81B-B17F31527DD4}\"DisplayName" = "My Defragmenter"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{91566393-AD20-4B92-A81B-B17F31527DD4}\"ModifyPath" = ""%ProgramFiles%\ConsumerSoft\My Defragmenter\Uninstall.exe" "%ProgramFiles%\ConsumerSoft\My Defragmenter\install.log""
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{91566393-AD20-4B92-A81B-B17F31527DD4}\"UninstallString" = ""%ProgramFiles%\ConsumerSoft\My Defragmenter\Uninstall.exe" "%ProgramFiles%\ConsumerSoft\My Defragmenter\install.log" -u"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{91566393-AD20-4B92-A81B-B17F31527DD4}\"InstallLocation" = "%ProgramFiles%\ConsumerSoft\My Defragmenter"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{91566393-AD20-4B92-A81B-B17F31527DD4}\2InstallSource" = "%AllUsersProfile%\Administrator\Desktop"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{91566393-AD20-4B92-A81B-B17F31527DD4}\"InstallSourceFile" = "%AllUsersProfile%\Administrator\Desktop\3d21684e42a580dc50a530353bea3ab6027c7d81479aa8e7d1dd48ce7e7d3fae.exe"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{91566393-AD20-4B92-A81B-B17F31527DD4}\"InstallDate" = "04/24/2018"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{91566393-AD20-4B92-A81B-B17F31527DD4}\"Publisher" = "ConsumerSoft"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{91566393-AD20-4B92-A81B-B17F31527DD4}\"DisplayVersion" = "1.0"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{91566393-AD20-4B92-A81B-B17F31527DD4}\"Readme" = "My Defragmenter"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{91566393-AD20-4B92-A81B-B17F31527DD4}\"Comments" = "My Defragmenter"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{91566393-AD20-4B92-A81B-B17F31527DD4}\"BuildTimeStamp" = "41099703141088"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{91566393-AD20-4B92-A81B-B17F31527DD4}\"SilentSettings" = "%ProgramFiles%\ConsumerSoft\My Defragmenter\install.sss"

PUA.MyDefragmenter is a disk defragmenter that installs the MyPhoneSupport application (Adware.MyPhoneSupport ) without user consent.

Upon uninstallation, and without user consent, the application starts defragmenting before the computer shuts down.

You may have arrived at this page either because you have been alerted by your Symantec product about this risk, or you are concerned that your computer has been affected by this risk.

Before proceeding further we recommend that you run a full system scan. If that does not resolve the problem you can try one of the options available below.

If you are a Norton product user, we recommend you try the following resources to remove this risk.

Removal Tool

If you have an infected Windows system file, you may need to replace it using the Windows installation CD .

How to reduce the risk of infection
The following resources provide further information and best practices to help reduce the risk of infection.

If you are a Symantec business product user, we recommend you try the following resources to remove this risk.

Identifying and submitting suspect files
Submitting suspicious files to Symantec allows us to ensure that our protection capabilities keep up with the ever-changing threat landscape. Submitted files are analyzed by Symantec Security Response and, where necessary, updated definitions are immediately distributed through LiveUpdate™ to all Symantec end points. This ensures that other computers nearby are protected from attack. The following resources may help in identifying suspicious files for submission to Symantec.

Removal Tool

If you have an infected Windows system file, you may need to replace it using the Windows installation CD .

How to reduce the risk of infection
The following resource provides further information and best practices to help reduce the risk of infection.
Protecting your business network

The following instructions pertain to all current Symantec antivirus products.

1. Performing a full system scan
For information on how to run a full system scan using your Symantec product, follow the guidance given in the product's Help section.

2. Restoring settings in the registry
Many risks make modifications to the registry, which could impact the functionality or performance of the compromised computer. While many of these modifications can be restored through various Windows components, it may be necessary to edit the registry. See in the Technical Details of this writeup for information about which registry keys were created or modified. Delete registry subkeys and entries created by the risk and return all modified registry entries to their previous values.