23 June 2015
Infection Length:
Xportsoft Technologies
Risk Impact:
Systems Affected:


PUA.PCOptimizerPro is a potentially unwanted application that displays misleading information about issues it claims are slowing down the computer. It may then ask the user to pay to fix the issues.

Note: Virus definitions dated June 23, 2015 or earlier detect this threat as PCOptimizerPro.

Antivirus Protection Dates

  • Initial Rapid Release version 05 January 2015 revision 008
  • Latest Rapid Release version 10 December 2018 revision 018
  • Initial Daily Certified version 05 January 2015 revision 019
  • Latest Daily Certified version 10 December 2018 revision 023
  • Initial Weekly Certified release date 07 January 2015
Click here for a more detailed description of Rapid Release and Daily Certified virus definitions.
The application must be manually installed.

Once executed, the application creates multiple files within the following folders:
  • %AllUsersProfile%\Application Data\Microsoft\Windows\Start Menu\Programs\PC Optimizer Pro
  • %AllUsersProfile%\Application Data\Start Menu\Programs\PC Optimizer Pro
  • %AllUsersProfile%\Microsoft\Windows\Start Menu\Programs\PC Optimizer Pro
  • %AllUsersProfile%\Start Menu\Programs\PC Optimizer Pro
  • %ProgramFiles%\PC Optimizer Pro

Next, the application creates the following registry entries:
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\*\shellex\ContextMenuHandlers\"PCProCtxMenu" = "{203ABD21-41F1-4F1B-BAE3-D6A89A90D239}"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\"PC Optimizer Pro" = "URL:PC Optimizer Pro Reg Protocol"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Directory\shellex\ContextMenuHandlers\"QPCBCtxMenu" = "{203ABD21-41F1-4F1B-BAE3-D6A89A90D239}"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Folder\ShellEx\ContextMenuHandlers\"QPCBCtxMenu" = "{203ABD21-41F1-4F1B-BAE3-D6A89A90D239}"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{12AB121E-44C6-488B-8773-B0AE25E662E1}\"TypeLib" = "{003B9C22-6FE0-4BCA-A73F-9AA99B9BBDAA}"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{12AB121E-44C6-488B-8773-B0AE25E662E1}\TypeLib\"Version" = "1.0"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{12AB121E-44C6-488B-8773-B0AE25E662E1}\"ProxyStubClsid32" = "{00020424-0000-0000-C000-000000000046}"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\"{12AB121E-44C6-488B-8773-B0AE25E662E1}" = "IPCProCtxMenu"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\lnkfile\shellex\ContextMenuHandlers\"PCProCtxMenu" = "{203ABD21-41F1-4F1B-BAE3-D6A89A90D239}"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\PC Optimizer Pro\"URL Protocol" = """"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\PC Optimizer Pro\shell\open\"command" = ""%ProgramFiles%\PC Optimizer Pro\PC Optimizer Pro.exe" -r"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{003B9C22-6FE0-4BCA-A73F-9AA99B9BBDAA}\1.0\0\"win64" = "%ProgramFiles%\PC Optimizer Pro\PCOptProCtxMenu.dll"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{003B9C22-6FE0-4BCA-A73F-9AA99B9BBDAA}\1.0\"HELPDIR" = "%ProgramFiles%\PC Optimizer Pro"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{003B9C22-6FE0-4BCA-A73F-9AA99B9BBDAA}\1.0\"FLAGS" = "0"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{003B9C22-6FE0-4BCA-A73F-9AA99B9BBDAA}\"1.0" = "PCOptProCtxMenu 1.0 Type Library"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{12AB121E-44C6-488B-8773-B0AE25E662E1}\"TypeLib" = "{003B9C22-6FE0-4BCA-A73F-9AA99B9BBDAA}"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{12AB121E-44C6-488B-8773-B0AE25E662E1}\TypeLib\"Version" = "1.0"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{12AB121E-44C6-488B-8773-B0AE25E662E1}\"ProxyStubClsid32" = "{00020424-0000-0000-C000-000000000046}"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\"{12AB121E-44C6-488B-8773-B0AE25E662E1}" = "IPCProCtxMenu"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Wow6432Node\TypeLib\{003B9C22-6FE0-4BCA-A73F-9AA99B9BBDAA}\1.0\0\"win64" = "%ProgramFiles%\PC Optimizer Pro\PCOptProCtxMenu.dll"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Wow6432Node\TypeLib\{003B9C22-6FE0-4BCA-A73F-9AA99B9BBDAA}\1.0\"HELPDIR" = "%ProgramFiles%\PC Optimizer Pro"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Wow6432Node\TypeLib\{003B9C22-6FE0-4BCA-A73F-9AA99B9BBDAA}\1.0\"FLAGS" = "0"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Wow6432Node\TypeLib\{003B9C22-6FE0-4BCA-A73F-9AA99B9BBDAA}\"1.0" = "PCOptProCtxMenu 1.0 Type Library"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\App Paths\"PC Optimizer Pro.exe" = "%ProgramFiles%\PC Optimizer Pro\PC Optimizer Pro.exe"
  • HKEY_USERS\S-1-5-21-417598209-1646830725-2700266360-500\Software\Microsoft\Windows\CurrentVersion\Explorer\StartPage\NewShortcuts\C:\Users\Administrator\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\User Pinned\TaskBar\"PC Optimizer Pro.lnk" = "1"

When the application is executed, it will perform a scan of the computer.

The application then displays a list of problems found on the computer; however, some results are exaggerated.

If the user chooses to fix the issues, the application asks the user to pay for the full version.

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
How to run a full system scan using your Symantec product

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.