21 January 2014

Enable Task Manager Disabled By Administrator/Virus [Solved]

Ideally, if something bad will happen with Software or applications, sometimes, we tend to use Windows Task Manager to stop or end the lagging apps. Some of us use TASK MANAGER in viewing the details of the running processes or services, and it could terminate programs (high with those infected with viruses/worms/trojans/spyware).

Some viruses will make your folders hidden, but it could be treat with this simple solution.
However, some viruses disable both Windows Manager and Registry Editor (Regedit) which is very inconvenient and frustrating especially on treating viruses/worms/trojans or on terminating unresponsive software.
Disabled by Virus or Administrator which displays Error Message
Disabled by Virus or Administrator which displays Error Message
NOTE:

  • Administrators or owners may set this Windows Task Manager to be disabled. Due to security reasons, although, anti-viruses(AVs) have the restriction which whenever it tries to stop its processes.
One way to terminate these harmful virus programs is simply to end first their running process background which can be viewed in the Windows Task Manager.

Take note:
  • These unwanted programs could hide from the Task Manager.
Due to its simple yet effective solution, coders/hackers make sure that it could not quickly stop by these procedures, and it appears that they are already wrote a code for these.

Related links:
Reasons Why It is Disabled
  • Administrators manually set it to DISABLE
  • Worms/Virus modify the registry database
Symptoms
  • When hitting CTRL+ALT+DELETE and it displays "Task Manager has been disabled by Administrator."
  • No Start Task Manager on right-clicking the tray or clicking CTRL+ALT+DELETE

Task Manager on Windows 7
Task Manager on Windows 7
As such, whenever you feel something a bit wrong with the system, and it prompts "Task Manager has been disabled by Administrator" error message. There could terrible is happening.

My Own Experiences

In my case, I encountered these so-called VBA(Visual Basic Script) /YUYUN.A on Avira virus definition or Cantix.A on other AV products.

You can check its definition:
Vbs/Yuyun.A or Cantix.A Brief History

Vbs/Yuyun.A or Cantix.A was first discovered on January 20, 2009. It is a worm type which means it replicates its code and drop to other files. Moreover, it adds modifications on Registry, and it disables both Task Manager and Registry Disabled.

It copies itself to the following locations:
  • %all directories%\Thumbs.db
  • %home%\My Documents\database.mdb
  • %WINDIR%\:Microsoft Office Update for Windows XP.sys
So if it is disabled, how to re-enable Task Manager?

This article adds more techniques or ways to re-enable your Windows Task Manager.

How to Re-enable Task-Manager on Windows (XP/VistaWindows 7/Windows 8)

There are six options to enable Windows Task Manager

Option #1: Enable Windows Task Manager Using CMD or Command Prompt

Command Prompt (cmd) is a powerful and useful utility that can be used to Enable Windows Task Manager.

1. Click on Start logo
2. Click type Run on the text search box if you are using Windows Vista/7/8. However, on Windows XP platform, you can just click the RUN after clicking Start.
3. Copy and Paste the code below
REG add HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System /v DisableTaskMgr /t REG_DWORD /d /0 /f
Format:

reg add [{/v ValueName | /ve}] [/t DataType] [/s Separator] [/d Data] [/f]

Parameters:
  • /v : Specifies the name of the registry entry to be added under the specified subkey.
  • /t : Specifies the type of the registry entry. Type must be one of the following:
    • REG_SZ
    • REG_MULTI_SZ
    • REG_DWORD_BIG_ENDIAN
    • REG_DWORD
    • REG_BINARY
    • REG_DWORD_LITTLE_ENDIAN
    • REG_LINK
    • REG_FULL_RESOURCE_DESCRIPTOR
    • REG_EXPAND_SZ
  • /d Specifies the data for the new registry entry.
  • /f Adds the registry entry without prompting for confirmation.
  • /0 means success on  displaying help for reg add 
4. Hit "Enter" key
5. Enjoy!

Option #2: Enable Windows Task Manager Using .BAT file

Batch (.Bat) files are programs or scripts that contain series of commands or tasks to be executed.
1. Click on Start logo
2. Click type Notepad on the text search box if you are using Windows Vista/7/8. 
However, on Windows XP platform, you can click on the Accessories folder then Notepad 
3. Copy and Paste the code below to Notepad
REG add HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System /v DisableTaskMgr /t REG_DWORD /d /0 /f
4. Save the file to .bat like TaskManagerEnable.bat

TIPS: 
  • After clicking Save as set to All Files on the Save as Type 
  • You can put start and end quotes between the filename, sample "TaskManagerEnable.bat"
5. Run TaskManagerEnable.bat or your chosen filename. On Windows Vista/7/8, right-click and RUN AS ADMINISTRATOR 

6. Enjoy!

Option #3: Enable Windows Task Manager Using Registry File (.Reg)

Registry files(.reg) can create, delete, and modify entries in the Registry Database on on its code provided.
In this case, we hope it will successfully set to enable the Windows Task Manager.

1.  Open Notepad
2. Copy and Paste this code
Windows Registry Editor Version 5.00 [HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\System] “DisableTaskMgr” =dword:00000000
3. Save the file to .reg like TaskManagerEnable.reg

 TIPS: 
  • After clicking Save as set to All Files on the Save as Type 
  • You can put start and end quotes between the filename, sample "TaskManagerEnable.bat"
5. Run TaskManagerEnable.reg or your chosen filename. On Windows Vista/7/8, right-click and RUN AS ADMINISTRATOR 
6. It will ask for your confirmation just click Yes
7. Try to access Windows Task Manager, if it is still cannot be accessed, reboot your computer.
8. Enjoy!

Option #4: Enable Windows Task Manager Using Registry Editor (Regedit)

Registry Editor (Regedit) is a useful tool used to modify, create, or delete registry keys. It can be found in C:\Windows.

1. Click on Start logo
2. Click type Run on the text search box if you are using Windows Vista/7/8. However, on Windows XP platform, you can just click the RUN after clicking Start.
3. Type Regedit and hit enter (or locate regedit.ext on C:\Windows directory)
4. In the left pane, Navigate (in order)
  • HKEY_CURRENT_USER\
  • Software\
  • Microsoft\ 
  • Windows\ 
  • Current Version\
  • Policies\
  • System
5. In the work area, locate DisableTaskMgr

TIP: If this value is not in the registry, create a new DWORD value with a name called DisableTaskMgr. Then double-click, enter value data of (0) zero.

6. Hit Ok.
7. Close Registry Editor.
8. Restart your computer.
9. Enjoy!

Option #5: Enable Windows Task Manager Using Local Group Policy Editor

Group Policy Editor is a great and useful feature on Windows that sets local policy program like Enabling Task Manager.

If the Option 4 has an error message "Registry editing has been disabled by your Administrator", this option is very useful.


1. Click on Start logo
2. Click type Run on the text search box if you are using Windows Vista/7/8. However, on Windows XP platform, you can just click the RUN after clicking Start.
3. Type gpedit.msc and hit enter
4. In the left pane, navigate (in order)
  • User Configuration
  • Administrative Templates
  • System
  • Ctrl+Alt+Del Options
5. Double click on Remove Task Manager 
6. Set to Not-Configured or Disabled
7. Restart or log off your computer to apply changes.
8. Enjoy

Additional:

You can use UnHookExec.inf to enable Registry Editor

Just copy paste the code below into your notepad.
[Version]
Signature="$Chicago$"
Provider=Symantec
[DefaultInstall]
AddReg=UnhookRegKey
[UnhookRegKey]
HKLM, Software\CLASSES\batfile\shell\open\command,,,"""%1"" %*"
HKLM, Software\CLASSES\comfile\shell\open\command,,,"""%1"" %*"
HKLM, Software\CLASSES\exefile\shell\open\command,,,"""%1"" %*"
HKLM, Software\CLASSES\piffile\shell\open\command,,,"""%1"" %*"
HKLM, Software\CLASSES\regfile\shell\open\command,,,"regedit.exe ""%1"""
HKLM, Software\CLASSES\scrfile\shell\open\command,,,"""%1"" %*"
HKCU, Software\Microsoft\Windows\CurrentVersion\Policies\System,DisableRegistryTools,0x00000020,0
Save as it to UnHookExec.inf or .inf
To install, right-click the file and choose Install.

Take Note:
  • Group Policy Editor(gpedit.msc) is not available on home editions of Windows. However, someone writes to create a Gpedit.msc works on Home Editions.
Home Editions includes:
  • Home Premium
  • Home Basic
  • Starter

Precaution:
  • It might harm your system. I don't recommend it and I am not liable for any loss in your system.
You can download and install it(at your risk)

Option #6: Enable Windows Task Manager Using TaskManagerFix software

TaskManagerFix is a small size(76kb) program that enables TaskManager with no procedures.

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