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"taskmgr.exe is not a valid Win32 application"


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#1 pnats

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Posted 09 April 2015 - 07:24 PM

So, yeah, whenever I manually try to start the Task Manager, it gives me the error message:

"C:\Windows\System32\taskmgr.exe is not a valid Win32 application".

If I try to start it via CTRL+SHIFT+ESC nothing happens, same if I start it via the CTRL+ALT+DEL menu.

I doubt it's a malware or virus issue, as I have both virus (Avira Pro) and malware (Malwarebytes Pro) scans scheduled daily. Both of them run and scan normally.

The file "taskmgr.exe" does exist, and can be found in my /System32/ folder. Starting it manually, however, does not do anything but bring up the aforementioned error message.

If I try to start "tskmgr.exe" via the command prompt, it simply says "Access is Denied", though the registry indicates that it is not disabled by the administrator (myself). Speaking of the command prompt, having run a "sfc /scannow" reveals that there are errors, but there are not able to be corrected. 

To clarify: everything else runs fine. I am having zero performance issues. No BSOD's, no slowdowns, nothing of the sort.

 

Any recommendations?


Edited by pnats, 09 April 2015 - 07:26 PM.


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#2 Aura

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Posted 09 April 2015 - 07:30 PM

Hi pnats :)

Your issue sure is weird, let's take a more in-depth look at it.

3Al62Pm.pngMiniToolBox
  • Download MiniToolBox and move the executable file to your Desktop;
  • Execute MiniToolBox and check the following options:
    • List Installed Programs;
    • List Last 10 Event Viewer Errors;
    • List Devices - Only Problems;
    • List Users, Partitions and Memory size;
      wNeKMCX.png
  • Once this is done, click on Go and wait for the scan to complete;
  • Once the scan is complete, a log will open. Please copy/paste the content of the output log in your next reply;

unite_blue.png
Security Administrator | Sysnative Windows Update Senior Analyst | Malware Hunter | @SecurityAura
My timezone UTC-05:00 (East. Coast). If I didn't reply to you within 48 hours, please send me a PM.


#3 hamluis

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Posted 09 April 2015 - 07:30 PM

You might try running chkdsk /r first...followed by running the sfc /scannow command...to try to eliminate the possibility of damaged/missing system files  and file corruption.

 

What other system anomalies do you have?  Can you access/install from Windows Update?

 

Louis



#4 pnats

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Posted 09 April 2015 - 08:47 PM

You might try running chkdsk /r first...followed by running the sfc /scannow command...to try to eliminate the possibility of damaged/missing system files  and file corruption.

 

What other system anomalies do you have?  Can you access/install from Windows Update?

 

Louis

I am not having any other system anomalies. The "sfc /scannow" reported system problems, but was unable to fix them. The CBS.log is uploaded here, as it was too large to upload on the forum.

 

 

  • Once the scan is complete, a log will open. Please copy/paste the content of the output log in your next reply;

Here is the output of the scan:

Spoiler


#5 Aura

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Posted 10 April 2015 - 07:16 AM

Please uninstall the following programs:
  • Adobe AIR - Outdated;
  • Adobe Flash Player ActiveX - Outdated;
  • Adobe Flash Player 11 Plugin - Outdated;
  • Avira System Speedup 1.6 - Not needed to be honest;
  • Coupin Printer for Windows - Seen as a PUP, uninstall it unless you use it;
  • Java 8 Update 25 (64-bits) - Outdated;
  • Java 8 Update 25 - Outdated;
  • Yahoo! Toolbar - Often seen as a PUP, unless you use it;
Also, I would reinstall Avira since some of its services cannot start (events logged in the Event Viewer). The installation might be damaged/corrupted, so a reinstallation should do the trick.

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#6 pnats

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Posted 13 April 2015 - 01:52 AM

Please uninstall the following programs:

  • Adobe AIR - Outdated;
  • Adobe Flash Player ActiveX - Outdated;
  • Adobe Flash Player 11 Plugin - Outdated;
  • Avira System Speedup 1.6 - Not needed to be honest;
  • Coupin Printer for Windows - Seen as a PUP, uninstall it unless you use it;
  • Java 8 Update 25 (64-bits) - Outdated;
  • Java 8 Update 25 - Outdated;
  • Yahoo! Toolbar - Often seen as a PUP, unless you use it;
Also, I would reinstall Avira since some of its services cannot start (events logged in the Event Viewer). The installation might be damaged/corrupted, so a reinstallation should do the trick.

 

Whoops! Sorry for the delay.

I've done all of that, and run an Avira scan. Didn't really help the Task Manager thing though.



#7 Aura

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Posted 13 April 2015 - 05:26 AM

It's alright, don't worry :) Next step.

sUc2qjf.pngAutoruns - Start-up Entries
Follow the instructions below to give me an Autoruns log containing your start-up entries:
  • Download Autoruns.zip from the Sysinternals Suite webpage;
  • Extract the content of the Autoruns.zip folder where you want, then go in the folder, right-click on Autoruns.exe and select Run as Administrator;
  • Accept the EULA on opening, then wait for all the entries to load;
  • Click on File then Save and save the file to a location easily accessible;
  • Go on ge.tt and upload the Autoruns file you saved;
  • Once done, post the download URL of your uploaded file in your next reply;

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Security Administrator | Sysnative Windows Update Senior Analyst | Malware Hunter | @SecurityAura
My timezone UTC-05:00 (East. Coast). If I didn't reply to you within 48 hours, please send me a PM.





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