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Content is republished with permission from Malwarebytes.

What is DiskFixer?

The Malwarebytes research team has determined that DiskFixer is a "system optimizer". These so-called "system optimizers" use intentional false positives to convince users that their systems have problems. Then they try to sell you their software, claiming it will remove these problems.
More information can be found on our Malwarebytes Labs blog.

How do I know if I am infected with DiskFixer?

This is how the main screen of the system optimizer looks:



You will find these icons in your taskbar, your startmenu, and on your desktop:



and see these warnings during install:





and this type of screens during "operations":



You may see this entry in your list of installed programs:



How did DiskFixer get on my computer?

These so-called system optimizers use different methods of getting installed. This particular one was downloaded from their website:



How do I remove DiskFixer?

Our program Malwarebytes can detect and remove this potentially unwanted application.

• Please download Malwarebytes for Windows to your desktop.
• Double-click MBSetup.exe and follow the prompts to install the program.
• When your Malwarebytes for Windows installation completes, the program opens to the Welcome to Malwarebytes screen.
• Click on the Get started button.
• Click Scan to start a Threat Scan.
• When the scan is finished click Quarantine to remove the found threats.
• Reboot the system if prompted to complete the removal process.

Is there anything else I need to do to get rid of DiskFixer?

• No, Malwarebytes removes DiskFixer completely.

How would the full version of Malwarebytes help protect me?

We hope our application and this guide have helped you eradicate this system optimizer.

As you can see below the full version of Malwarebytes would have protected you against the DiskFixer installer. It would have warned you before the application could install itself, giving you a chance to stop it before it became too late.

and Malwarebytes Browser Guard blocks access to their domain:

Technical details for experts

You may see these entries in FRST logs:

() [File not signed] C:\Program Files (x86)\DiskFixer\DiskFixer.exe
HKLM-x32\...\Run: [DiskFixer] => C:\Program Files (x86)\DiskFixer\DiskFixer.exe [247808 2019-07-04] () [File not signed]
C:\Program Files (x86)\DiskFixer
(MyAppsLand ) C:\Users\{username}\Desktop\diskfixer.exe

DiskFixer version 1.0 (HKLM-x32\...\DiskFixer_is1) (Version: 1.0 - MyAppsLand) <==== ATTENTION

Alterations made by the installer:

File system details [View: All details] (Selection)
---------------------------------------------------
    Adds the folder C:\Program Files (x86)\DiskFixer
       Adds the file DiskFixer.exe"="7/4/2019 1:59 PM, 247808 bytes, A
       Adds the file LinqBridge.dll"="7/3/2019 12:52 PM, 62976 bytes, A
       Adds the file unins000.dat"="12/11/2019 9:44 AM, 1334 bytes, A
       Adds the file unins000.exe"="12/11/2019 9:43 AM, 730789 bytes, A
    In the existing folder C:\Users\{username}\Desktop
       Adds the file DiskFixer.lnk"="12/11/2019 9:44 AM, 1019 bytes, A

Registry details [View: All details] (Selection)
------------------------------------------------
    [HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run]
       "DiskFixer"="REG_SZ", ""C:\Program Files (x86)\DiskFixer\DiskFixer.exe""
    [HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\DiskFixer_is1]
       "DisplayName"="REG_SZ", "DiskFixer version 1.0"
       "DisplayVersion"="REG_SZ", "1.0"
       "EstimatedSize"="REG_DWORD", 1006
       "Inno Setup: App Path"="REG_SZ", "C:\Program Files (x86)\DiskFixer"
       "Inno Setup: Deselected Tasks"="REG_SZ", ""
       "Inno Setup: Icon Group"="REG_SZ", "DiskFixer"
       "Inno Setup: Language"="REG_SZ", "english"
       "Inno Setup: Selected Tasks"="REG_SZ", "desktopicon"
       "Inno Setup: Setup Version"="REG_SZ", "5.6.1 (a)"
       "Inno Setup: User"="REG_SZ", "{username}"
       "InstallDate"="REG_SZ", "20191211"
       "InstallLocation"="REG_SZ", "C:\Program Files (x86)\DiskFixer\"
       "MajorVersion"="REG_DWORD", 1
       "MinorVersion"="REG_DWORD", 0
       "NoModify"="REG_DWORD", 1
       "NoRepair"="REG_DWORD", 1
       "Publisher"="REG_SZ", "MyAppsLand"
       "QuietUninstallString"="REG_SZ", ""C:\Program Files (x86)\DiskFixer\unins000.exe" /SILENT"
       "UninstallString"="REG_SZ", ""C:\Program Files (x86)\DiskFixer\unins000.exe""
       "VersionMajor"="REG_DWORD", 1
       "VersionMinor"="REG_DWORD", 0

Malwarebytes log:

Malwarebytes
www.malwarebytes.com

-Log Details-
Scan Date: 12/11/19
Scan Time: 10:07 AM
Log File: ab82ed78-1bf5-11ea-8834-00ffdcc6fdfc.json

-Software Information-
Version: 4.0.4.49
Components Version: 1.0.770
Update Package Version: 1.0.15990
License: Premium

-System Information-
OS: Windows 7 Service Pack 1
CPU: x64
File System: NTFS
User: {computername}\{username}

-Scan Summary-
Scan Type: Threat Scan
Scan Initiated By: Manual
Result: Completed
Objects Scanned: 235591
Threats Detected: 12
Threats Quarantined: 12
Time Elapsed: 9 min, 46 sec

-Scan Options-
Memory: Enabled
Startup: Enabled
Filesystem: Enabled
Archives: Enabled
Rootkits: Disabled
Heuristics: Enabled
PUP: Detect
PUM: Detect

-Scan Details-
Process: 1
PUP.Optional.DiskFixer, C:\Program Files (x86)\DiskFixer\DiskFixer.exe, Quarantined, 2961, 758710, , , , 

Module: 2
PUP.Optional.DiskFixer, C:\Program Files (x86)\DiskFixer\DiskFixer.exe, Quarantined, 2961, 758710, , , , 
PUP.Optional.DiskFixer, C:\Program Files (x86)\DiskFixer\LinqBridge.dll, Quarantined, 2961, 758710, , , , 

Registry Key: 1
PUP.Optional.DiskFixer, HKLM\SOFTWARE\WOW6432NODE\MICROSOFT\WINDOWS\CURRENTVERSION\UNINSTALL\DiskFixer_is1, Quarantined, 2961, 758713, 1.0.15990, , ame, 

Registry Value: 1
PUP.Optional.DiskFixer, HKLM\SOFTWARE\WOW6432NODE\MICROSOFT\WINDOWS\CURRENTVERSION\RUN|DiskFixer, Quarantined, 2961, 758710, , , , 

Registry Data: 0
(No malicious items detected)

Data Stream: 0
(No malicious items detected)

Folder: 1
PUP.Optional.DiskFixer, C:\PROGRAM FILES (X86)\DISKFIXER, Quarantined, 2961, 758710, 1.0.15990, , ame, 

File: 6
PUP.Optional.DiskFixer, C:\USERS\{username}\DESKTOP\DISKFIXER.LNK, Quarantined, 2961, 758711, 1.0.15990, , ame, 
PUP.Optional.DiskFixer, C:\Program Files (x86)\DiskFixer\DiskFixer.exe, Quarantined, 2961, 758710, , , , 
PUP.Optional.DiskFixer, C:\Program Files (x86)\DiskFixer\LinqBridge.dll, Quarantined, 2961, 758710, , , , 
PUP.Optional.DiskFixer, C:\Program Files (x86)\DiskFixer\unins000.dat, Quarantined, 2961, 758710, , , , 
PUP.Optional.DiskFixer, C:\Program Files (x86)\DiskFixer\unins000.exe, Quarantined, 2961, 758710, , , , 
PUP.Optional.DiskFixer, C:\USERS\{username}\DESKTOP\DISKFIXER.EXE, Quarantined, 2961, 758704, 1.0.15990, , ame, 

Physical Sector: 0
(No malicious items detected)

WMI: 0
(No malicious items detected)


(end)

As mentioned before the full version of Malwarebytes could have protected your computer against this threat.
We use different ways of protecting your computer(s):

• Dynamically Blocks Malware Sites & Servers
• Malware Execution Prevention

Save yourself the hassle and get protected.