Can not Build and View pdfLatex for the first time in windows

I’ve just installed MikTex and then TexStudio but I can not compile a simple code like documentclass{article} in texStudio and gives error :

and this is the log pointing to :

2021-02-14 13:03:48,278+0330 INFO  pdflatex - this process (9136) started by 'texstudio' with command line: pdflatex.exe -synctex=1 -interaction=nonstopmode test1.tex
2021-02-14 13:03:48,286+0330 WARN  pdflatex - security risk: running with elevated privileges
2021-02-14 13:03:48,293+0330 INFO  pdflatex - allowing known shell commands
2021-02-14 13:03:48,326+0330 INFO  pdflatex - going to create file: pdflatex.fmt
2021-02-14 13:03:48,361+0330 INFO  pdflatex.core - start process: initexmf --dump-by-name=pdflatex --engine=pdftex
2021-02-14 13:03:49,395+0330 ERROR pdflatex - C:Usersz.ghAppDataLocalProgramsMiKTeXmiktexbinx64initexmf.exe did not succeed; exitCode: 1
2021-02-14 13:03:49,395+0330 ERROR pdflatex - output:
2021-02-14 13:03:49,395+0330 ERROR pdflatex - initexmf: security risk: running with elevated privileges

Sorry, but "MiKTeX Configuration Utility" did not succeed.

The log file hopefully contains the information to get MiKTeX going again:

  C:Usersz.ghAppDataLocalMiKTeXmiktexloginitexmf.log

2021-02-14 13:03:49,395+0330 FATAL pdflatex.core - The memory dump file could not be found.
2021-02-14 13:03:49,395+0330 FATAL pdflatex.core - Data: fileName="pdflatex.fmt"
2021-02-14 13:03:49,396+0330 FATAL pdflatex.core - Source: LibrariesMiKTeXTeXAndFriendstexmfapp.cpp:717
2021-02-14 13:03:49,396+0330 FATAL pdflatex - The memory dump file could not be found.
2021-02-14 13:03:49,396+0330 FATAL pdflatex - Info: fileName="pdflatex.fmt"
2021-02-14 13:03:49,396+0330 FATAL pdflatex - Source: LibrariesMiKTeXTeXAndFriendstexmfapp.cpp
2021-02-14 13:03:49,396+0330 FATAL pdflatex - Line: 717
2021-02-14 13:03:49,396+0330 INFO  pdflatex - this process (9136) finishes with exit code 1

How can I fix the problem ?