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Content is republished with permission from Malwarebytes.

What is RegistryCleanerPro?

The Malwarebytes research team has determined that RegistryCleanerPro 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 RegistryCleanerPro?

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



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



and see these warnings during install:





and these screens during "operations":





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



How did RegistryCleanerPro get on my computer?

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

How do I remove RegistryCleanerPro?

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

• Please download Malwarebytes to your desktop.
• Double-click mb3-setup-consumer-{version}.exe and follow the prompts to install the program.
• Then click Finish.
• Once the program has fully updated, select Scan Now on the Dashboard. Or select the Threat Scan from the Scan menu.
• If another update of the definitions is available, it will be implemented before the rest of the scanning procedure.
• When the scan is complete, make sure that all Threats are selected, and click Remove Selected.
• Restart your computer when prompted to do so.

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

• No, Malwarebytes removes RegistryCleanerPro 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 RegistryCleanerPro 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 we block access to their domain:

Technical details for experts

You may see these entries in FRST logs:

 () C:\Program Files (x86)\RegistryCleanerPro\RegistryCleanerPro.exe
 C:\Users\{username}\Desktop\RegistryCleanerPro.lnk
 C:\Users\{username}\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\RegistryCleanerPro
 C:\ProgramData\RegClean
 C:\Program Files (x86)\RegistryCleanerPro

RegistryCleanerPro (HKLM-x32\...\RegistryCleanerPro) (Version: 38.1 - )

Alterations made by the installer:

File system details [View: All details] (Selection)
---------------------------------------------------
    Adds the folder C:\Program Files (x86)\RegistryCleanerPro
       Adds the file RegistryCleanerPro.exe"="7/6/2016 9:47 AM, 2074888 bytes, A
       Adds the file uninst.exe"="3/24/2017 1:19 PM, 63446 bytes, A
    Adds the folder C:\ProgramData\RegClean\Backups
    Adds the folder C:\ProgramData\RegClean\Logs
    Adds the folder C:\Users\{username}\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\RegistryCleanerPro
       Adds the file RegistryCleanerPro.lnk"="3/24/2017 1:19 PM, 1163 bytes, A
       Adds the file Uninstall.lnk"="3/24/2017 1:19 PM, 886 bytes, A
    In the existing folder C:\Users\{username}\Desktop
       Adds the file RegistryCleanerPro.lnk"="3/24/2017 1:19 PM, 1127 bytes, A

Registry details [View: All details] (Selection)
------------------------------------------------
    [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\App Paths\RegistryCleanerPro.exe]
       "(Default)"="REG_SZ", "C:\Program Files (x86)\RegistryCleanerPro\RegistryCleanerPro.exe"
    [HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\RegistryCleanerPro]
       "DisplayIcon"="REG_SZ", "C:\Program Files (x86)\RegistryCleanerPro\RegistryCleanerPro.exe"
       "DisplayName"="REG_SZ", "RegistryCleanerPro"
       "DisplayVersion"="REG_SZ", "38.1"
       "NSIS:Language"="REG_SZ", "1033"
       "Publisher"="REG_SZ", ""
       "UninstallString"="REG_SZ", "C:\Program Files (x86)\RegistryCleanerPro\uninst.exe"
       "URLInfoAbout"="REG_SZ", ""
    [HKEY_CURRENT_USER\Software\RegistryCleanerPro]
       "Activated"="REG_DWORD", 0
       "AutoRun"="REG_DWORD", 0
       "BackupDir"="REG_SZ", "Backup\"
       "CloseToTray"="REG_DWORD", 1
       "CreateSysRestore"="REG_DWORD", 1
       "DelBackupAfterRest"="REG_DWORD", 1
       "ErrFixed"="REG_DWORD", 0
       "ErrFound"="REG_DWORD", 0
       "IDLang"="REG_DWORD", 0
       "IgnoreMisFiles"="REG_DWORD", 1
       "InstallID"="REG_SZ", "392E1F6F1FF35BFF17795243EEF9B66A"
       "LastAnalizeDatei"="REG_BINARY, ....
       "LastAnalizeRes"="REG_SZ", ""
       "LastBackupDatei"="REG_BINARY, ....
       "LastDefragDatei"="REG_BINARY, ....
       "LastFixDatei"="REG_BINARY, ....
       "LastScanDatei"="REG_BINARY, ....
       "Partner"="REG_SZ", "from_stw"
       "ProxyHost"="REG_SZ", ""
       "ProxyLogin"="REG_SZ", ""
       "ProxyPassw"="REG_SZ", ""
       "ProxyPort"="REG_SZ", ""
       "SerialNum"="REG_SZ", ""
       "Subtrack"="REG_SZ", ""
       "TrialFix"="REG_DWORD", 1
       "UseProxy"="REG_DWORD", 0
    [HKEY_CURRENT_USER\Software\RegistryCleanerPro\Excludes]
    [HKEY_CURRENT_USER\Software\RegistryCleanerPro\LastDefragRes]
       "ItemsCount"="REG_DWORD", 0

Malwarebytes log:

Malwarebytes
www.malwarebytes.com

-Log Details-
Scan Date: 3/24/17
Scan Time: 1:30 PM
Logfile: mbamRegistryCleanerPro.txt
Administrator: Yes

-Software Information-
Version: 3.0.5.1299
Components Version: 1.0.43
Update Package Version: 1.0.1584
License: Premium

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

-Scan Summary-
Scan Type: Threat Scan
Result: Completed
Objects Scanned: 366305
Time Elapsed: 6 min, 38 sec

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

-Scan Details-
Process: 1
PUP.Optional.oTweak, C:\PROGRAM FILES (X86)\REGISTRYCLEANERPRO\REGISTRYCLEANERPRO.EXE, Quarantined, [1897], [369663],1.0.1584

Module: 1
PUP.Optional.oTweak, C:\PROGRAM FILES (X86)\REGISTRYCLEANERPRO\REGISTRYCLEANERPRO.EXE, Quarantined, [1897], [369663],1.0.1584

Registry Key: 1
Rogue.RegistryCleanerPro, HKLM\SOFTWARE\WOW6432NODE\MICROSOFT\WINDOWS\CURRENTVERSION\UNINSTALL\RegistryCleanerPro, Delete-on-Reboot, [13781], [171218],1.0.1584

Registry Value: 0
(No malicious items detected)

Data Stream: 0
(No malicious items detected)

Folder: 2
Rogue.RegistryCleanerPro, C:\PROGRAM FILES (X86)\RegistryCleanerPro, Delete-on-Reboot, [13781], [171218],1.0.1584
Rogue.RegistryCleanerPro, C:\USERS\{username}\APPDATA\ROAMING\MICROSOFT\WINDOWS\START MENU\PROGRAMS\REGISTRYCLEANERPRO, Delete-on-Reboot, [13781], [171855],1.0.1584

File: 6
PUP.Optional.oTweak, C:\PROGRAM FILES (X86)\REGISTRYCLEANERPRO\REGISTRYCLEANERPRO.EXE, Delete-on-Reboot, [1897], [369663],1.0.1584
Rogue.RegistryCleanerPro, C:\USERS\{username}\DESKTOP\REGISTRYCLEANERPRO.LNK, Delete-on-Reboot, [13781], [199819],1.0.1584
PUP.Optional.oTweak, C:\USERS\{username}\DESKTOP\REGISTRYCLEANERPRO.EXE, Delete-on-Reboot, [1897], [369663],1.0.1584
Rogue.RegistryCleanerPro, C:\Program Files (x86)\RegistryCleanerPro\uninst.exe, Delete-on-Reboot, [13781], [171218],1.0.1584
Rogue.RegistryCleanerPro, C:\Users\{username}\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\RegistryCleanerPro\RegistryCleanerPro.lnk, Delete-on-Reboot, [13781], [171855],1.0.1584
Rogue.RegistryCleanerPro, C:\Users\{username}\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\RegistryCleanerPro\Uninstall.lnk, Delete-on-Reboot, [13781], [171855],1.0.1584

Physical Sector: 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.