After I start my laptop, the explorer.exe process keeps crashing and restarting forever.
I tried to boot the system in clean boot state, but the problem persists.
After that, I tried to look in the event viewer program, and these are the errors I can spot :

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Could you please point me to the origin for this problem ?
Thank you in advance !!


It is caused by DLL module loaded into explorer C:\Program Filex (x86)\Nuance\PDF Reader\Bin\PDFCore8_x64.dll.

I think that module can be disabled by autoruns.

  • Where can I find the autoruns utility ? I can't look for it in the windows explorer, it's crashing every second :/ !! – mounaim May 15 '16 at 15:34
  • download 7-zip.org/download.html and autoruns (link in answer). Unpack it into C:\autoruns by 7-zip and start C:\autoruns\Autoruns.exe from command line. – Misaz May 15 '16 at 15:39
  • If you don't see taskbar, press Ctrl + Shift + Esc, go to File > Run new Task > write CMD and press enter. That open command prompt. – Misaz May 15 '16 at 15:41
  • I can't do anything on my system except using cmd.. – mounaim May 15 '16 at 15:44
  • Boot from a linux live usb, rename PDFCore8_x64.dll to PDFCore8_x64.dll.bak exit linux and boot windows. – Moab May 15 '16 at 16:26

Right-click Start, click Command Prompt (Admin). Type:

regsvr32 /u "C:\Program Files (x86)\Nuance\PDF Reader\Bin\PDFCore8_x64.dll"

Press Enter. Logoff and login back

  • I can't lunch cmd as administrator, because I can't do anything on the UI..that's my problem :/ – mounaim May 15 '16 at 17:54
  • Open Task Manager, click File > Run new Task. Check the option "Create this task with administrative privileges". Type cmd and click OK. – w32sh May 15 '16 at 18:56

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