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Diagnostic Service Host: access denied ?

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#1 badman62


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Posted 04 February 2015 - 02:48 PM

Hi all

not sure how or what happened

or, even how i noticed it, but these 2 services will not turn on

(not sure if i even need them?_)



WdiServiceHost  Diagnostic Service Host

WdiSystemHost Diagnostic System Host


error 5: access is denied.


in services, it was denied for some reason

i changed it to manual, but

the "start" is greyed out when i right click on it.

when i open properties, i can change the startup type (manual, auto etc...)

but, if i try to change anything in the log-on tab, or the recovery tab

i get the "error 5" message...


i did have IO-bit Advanced SystemCare installed 

i ju8st removed it.

i did a sweep with malwarebytes, and cleaned the system with CC cleaner.


i also had a hard drive that i had lost access to

possible it was a permissions thing.

i re-formatted it, and that is all OK now

as far as i know.

not sure if its related, but, its the last problem i had.




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#2 Sintharius


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Posted 04 February 2015 - 02:53 PM

Hi there Brad :)

Since you had Advanced System Care installed I suspect it's the culprit. ASC is considered a "system optimizer" which usually includes a so-called "registry cleaner" - using these are not recommended at all since they carry a very high risk of messing up the Windows Registry - thus breaking your Windows installation.

And iOBit's reputation is not that good, as they are known for shady work ethics - the most famous one is them stealing the definitions database from Malwarebytes Corporation.

If you are using CCleaner, I recommend that you NEVER use the Registry Cleaner option for the reasons I listed above.

Hope this helps.


Edited by Alexstrasza, 04 February 2015 - 02:54 PM.

#3 badman62

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Posted 04 February 2015 - 04:49 PM

Hi Alex

appreciate the comment.

i dont normally use those type things, ju8st thought it would be easier/quicker

and figured there may be new good software out there now

( i used to fix PC's back in the 98 /XP days)

ive changed careers and dont really fool with the PC like i used to


seems things havent gotten much better LOL


isnt there a file, or permissions, or something i can do to repair it ?

do i need it ?




Edited by badman62, 04 February 2015 - 04:49 PM.

#4 Sintharius


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Posted 04 February 2015 - 05:05 PM

Hi there Brad,

From what I know about these "registry cleaners", I think they deleted keys associated with the services and permission. It also explains why a reinstall fixed all those problems since the missing keys are replaced.

And yes, you do need those services if you are going to troubleshoot something with the native Windows troubleshooter. Funny how one of my old Windows installations also had those two services broken by TuneUp Utilities, and I could not troubleshoot any internet connection problems.


#5 hamluis



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Posted 06 February 2015 - 04:40 PM

Good comments by Alex :).


Registry Cleaner, Animal - http://www.bleepingcomputer.com/forums/t/526247/tune-up-utilities-2014-problem/?p=3303494


Since these tools may have done whatever to the registry and system files...IMO, the best approach is to first uninstall all such programs...then run the chkdsk /r and sfc /scannow commands to try to minimize the chaos caused by missing/damaged system files.


Chkdsk From Command Prompt, Win 7 - http://www.bleepingcomputer.com/forums/t/496613/contextmenu-is-causing-explorerexe-to-crash/?p=3067880


SFC -SCANNOW Run in Command Prompt at Boot - Windows 7 Forums - http://www.sevenforums.com/tutorials/139810-sfc-scannow-run-command-prompt-boot.html.



#6 Go The Power

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Posted 06 February 2015 - 10:59 PM


When it comes to permissions on a service there could be a few factors. Please follow the instructions provided by Louis first, after SFC has ran can also plese provide the following log:

Convert CBS.log to CBS.txt
  • Click on the Win7Orb_zps4dae3b32.jpg button => Inside the search box copy and paste the following command:
    cmd /c copy %windir%\logs\cbs\cbs.log "%userprofile%\Desktop\cbs.txt"
  • Press Enter
  • Once this has completed please go to your Desktop and you will find CBS.txt => Please upload CBS.txt to this thread
Please Note:: if the file is too big to upload to you next post please upload via Dropbox or One Drive

If SFC or CHKDSK doesn't resolve this issue.

Can you please provide the following information:
  • Click on the Win7Orb_zps4dae3b32.jpg button. Inside the search box type in CMD
  • Right click on CMD => Choose Run as Administrator
  • Inside the Command Prompt windows copy and paste the following command:
    SC SDSHOW WdiServiceHost>1&& SC SDSHOW WdiSystemHost>>1&&notepad 1
  • Please copy and paste the results back into this thread.

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