Texmaker and TeXstudio ⇒ Compilation Process fails

[aar_401]

Hi everybody.
i am a beginner in LaTeX and i got a problem with TeXmaker which is :
when i want to compile a simple .tex file and convert it to .pdf ,at first TeXmaker says could not start the command and it prints couples of lines in message - log window which are :

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Process started

This is pdfTeX, Version 3.1415926-1.40.9 (MiKTeX 2.7)

Running pdftex...

I can't find the default format file!

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This is pdfTeX, Version 3.1415926-1.40.9 (MiKTeX 2.7) (INITEX) 
entering extended mode
("F:\Program Files (x86)\MiKTeX 2.7\tex\latex\config\pdflatex.ini"
(C:\ProgramData\MiKTeX\2.7\tex\generic\config\pdftexconfig.tex)
("F:\Program Files (x86)\MiKTeX 2.7\tex\latex\base\latex.ltx" 
("F:\Program Files (x86)\MiKTeX 2.7\tex\latex\00miktex
\texsys.cfg") ./texsys.aux found \@currdir set to: ./.
Assuming \openin and \input have the same search path. 
Defining UNIX/DOS style filename parser. catcodes, registers, compatibility for TeX 2, parameters,
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
! You are attempting to make a LaTeX format from a source file
! That is more than five years old.
!! If you enter <return> to scroll past this message then the format
! will be built, but please consider obtaining newer source files
! before continuing to build LaTeX.
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
! LaTeX source files more than 5 years old!. l.545 ...aTeX source files more than 5 years old!}
! ==> Fatal error occurred, no output PDF file produced!
Transcript written on pdflatex.log.

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makefmt: pdftex failed on pdflatex.ini.
initexmf.EXE: The operation failed for some reason.

Process exited with error(s)

What should i do to fix this problem ?

your ideas would be appreciated.

many tanks my friends.

[GerlofVito]

It would help if you could post a minimal working example of the source file you're trying to typeset.

[Stefan Kottwitz]

Here you can see the error, extracted from your log:

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! LaTeX source files more than 5 years old!.
l.545 ...aTeX source files more than 5 years old!} !
  ==> Fatal error occurred, no output PDF file produced! Transcript written on pdflatex.log.
makefmt: pdftex failed on pdflatex.ini.
initexmf.EXE: The operation failed for some reason.
Process exited with error(s)

You should update your LaTeX system. Either update to MiKTeX 2.9, or install the recently released TeX Live 2012.

Stefan