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edit:

i like to learn how to use biblatex. for this i installed biblatex and in editor (winedt) adjust biber as backend. for the test i use the minimal example from gist.github.com/moewew as suggest moewe:

documentclass{article}

usepackage[style=authoryear, backend=biber]{biblatex}

addbibresource{biblatex-examples.bib}

begin{document}

cite{sigfridsson}

printbibliography

end{document}

i immediately obtain error:

undefined control sequence

<recently read> addbibresource



l.54     addbibresource{sample.bib} 

i try with pdfLaTeX as well with pdfLaTeXify. in both case i got the same error. i use recent 64-bit MikTeX and recent WinEdt editor.

after compiling with ˙latexi obtain the followingblg` file:

[0] Config.pm:304> INFO - This is Biber 2.12

[0] Config.pm:307> INFO - Logfile is 'biblatex_test-1.blg'

[44] biber-MSWIN64:315> INFO - === 

[66] Utils.pm:209> ERROR - biblatex_test-1.bcf is malformed, last biblatex run probably failed. Deleted biblatex_test-1.bbl

[66] Biber.pm:114> INFO - ERRORS: 1

.log file is long, but i thing that relevant part is:

(C:/localtexmftexlatexbiblatexlatexbiblatex.def

File: biblatex.def 2009/07/04 v0.8e biblatex generic definitions

c@smartand=count143

)

Package biblatex Info: Trying to load bibliography style 'authoryear'...

Package biblatex Info: ... file 'authoryear.bbx' found.



(C:/localtexmftexlatexbiblatexlatexbbxauthoryear.bbx

File: authoryear.bbx 2009/07/04 v0.8e biblatex bibliography style

Package biblatex Info: Trying to load bibliography style 'standard'...

Package biblatex Info: ... file 'standard.bbx' found.



(C:/localtexmftexlatexbiblatexlatexbbxstandard.bbx

File: standard.bbx 2009/07/04 v0.8e biblatex bibliography style

))

Package biblatex Info: Trying to load citation style 'authoryear'...

Package biblatex Info: ... file 'authoryear.cbx' found.



(C:/localtexmftexlatexbiblatexlatexcbxauthoryear.cbx

File: authoryear.cbx 2009/07/04 v0.8e biblatex citation style

Package biblatex Info: Redefining 'cite'.

Package biblatex Info: Redefining 'parencite'.

Package biblatex Info: Redefining 'footcite'.

Package biblatex Info: Redefining 'textcite'.

)

Package biblatex Info: Trying to load configuration file...

Package biblatex Info: ... file 'biblatex.cfg' found.



(C:/localtexmftexlatexbiblatexlatexbiblatex.cfg

File: biblatex.cfg 

))

! Undefined control sequence.

<recently read> addbibresource 



l.3 addbibresource

                   {biblatex-examples.bib}

? 



! LaTeX Error: Missing begin{document}.



See the LaTeX manual or LaTeX Companion for explanation.

Type  H <return>  for immediate help.

 ...                                              

The .log file shows that you have the ancient biblarex v0.8e from July 2009 (more than nine years ago) in your C:/localtexmf directory.

Incidentally, this is the oldest version for which I could find sources when I built an archive of older biblatex versions and the documentation for that version warns

Please be advised that this package is in beta stage and released for testing. The version number will be stepped up to 1.0 as soon as it is considered suitable for general distribution.

I assume that C:/localtexmf is your local texmf tree for experiments and local package installs. That directory is usually given preference over the package versions installed via your TeX distribution. I suggest you remove the manual biblatex install in that folder. You may also want to have a look around there for other older versions of TeX packages. Maybe you can sell them to collectors – but at the very least you can make sure that you are not limiting your system to ancient version of actively developed TeX packages.

Just for completeness' sake: addbibresource was introduced as replacement for bibliography in version 1.2 of biblatex (released in February 2011) according to the extended changelog in biblatex.tex (commented out in the PDF version), so one and a half years after your version came out.