[MiKTeX] A failure while updating formats

[Pavel <pa...@gm...>]

After downloading updates I tried to "Update Formats".
However, "The MikTeX configuration utility failed."

The transcript in pdfetex.log was as follows:
--------------------------------------------------------------------
Creating the pdfetex format file...
Running pdfetex...
This is pdfeTeX, Version 3.141592-1.30.6-2.2 (MiKTeX 2.5) (INITEX)

entering extended mode

(C:\texmf\miktex\config\pdfetex.ini)

! Emergency stop.

<*> *\relax \input pdfetex.ini



No pages of output.

Transcript written on pdfetex.log.

makefmt: pdfetex failed on pdfetex.ini.
initexmf.EXE: The operation failed for some reason.
--------------------------------------------------------------------

How can I fix this?
Thank you.