[Bug Report] Basic MiKTeX 2.9.5105 Windows (32, 64-bit) failed to install

Windows installer of MiKTeX 2.9.5105 failed to install on my computer (Win
8.1).
It seems that there is path name problem about slash or backslash.

The (failed) install log is as follows:


MiKTeX Setup 2.9.4503 Report

Date: Sunday, May 24, 2015
Time: 05:26:36
OS version: Microsoft Windows 8 Business Edition, 64-bit (build 9200)
SystemAdmin: yes
PowerUser: false
SharedSetup: yes
Setup path: C:\Users\jwjung\Downloads\basic-miktex-2.9.5105-x64.exe
UserRoots: <none specified>
UserData: <none specified>
UserConfig: <none specified>
CommonRoots: <none specified>
CommonData: <none specified>
CommonConfig: <none specified>

Installation: C:\Program Files\MiKTeX 2.9
Loading package database...
starting package maintenance...
installation directory: "C:\Program Files\MiKTeX 2.9"
package repository: C:\Users\jwjung\AppData\Local\Temp\mik50806
visiting repository C:\Users\jwjung\AppData\Local\Temp\mik50806...
repository type: local package repository
loading lightweight database...
lightweight database digest: 2e1ee451b3ebfd4ef4afc81bbceafc9f
going to install 9553 file(s) (158 package(s))
problem: C:\Program Files\MiKTeX 2.9\*miktex/bin/x64*\MiKTeX209-core-PS.dll
does not exist
problem: C:\Program Files\MiKTeX 2.9\*miktex/bin/x64*\MiKTeX209-core.dll
does not exist
problem: C:\Program Files\MiKTeX
2.9*\miktex/bin/x64*\MiKTeX209-packagemanager-PS.dll
does not exist
problem: C:\Program Files\MiKTeX
2.9\*miktex/bin/x64*\MiKTeX209-packagemanager.dll
does not exist
extracting files from ae.tar.lzma...
extracting files from amscls.tar.lzma...
extracting files from amsfonts.tar.lzma...
extracting files from amsmath.tar.lzma...
extracting files from avantgar.cab...
extracting files from babel.tar.lzma...
extracting files from bidi.tar.lzma...
extracting files from bookman.cab...
extracting files from carlisle.tar.lzma...
extracting files from cbcoptic.tar.lzma...
extracting files from cm.tar.lzma...
extracting files from courier.tar.lzma...
extracting files from dehyph-exptl.tar.lzma...
extracting files from ec.tar.lzma...
extracting files from elhyphen.tar.lzma...
extracting files from enctex.tar.lzma...
extracting files from euenc.tar.lzma...
extracting files from eurosym.tar.lzma...
extracting files from float.cab...
extracting files from fontspec.tar.lzma...
extracting files from geometry.tar.lzma...
extracting files from graphics.tar.lzma...
extracting files from helvetic.cab...
extracting files from hoekwater.tar.lzma...
extracting files from hyperref.tar.lzma...
extracting files from hyph-utf8.tar.lzma...
extracting files from ifxetex.tar.lzma...
extracting files from jknappen.cab...
extracting files from latex-fonts.tar.lzma...
extracting files from latex2e-help-texinfo.tar.lzma...
extracting files from lm.tar.lzma...
extracting files from ltxbase.tar.lzma...
extracting files from ltxmisc.tar.lzma...
extracting files from lua-alt-getopt.tar.lzma...
extracting files from luainputenc.tar.lzma...
extracting files from lualibs.tar.lzma...
extracting files from luamplib.tar.lzma...
extracting files from luaotfload.tar.lzma...
extracting files from luatexbase.tar.lzma...
extracting files from luatextra.tar.lzma...
extracting files from mflogo.cab...
extracting files from miktex-arctrl-bin-x64-2.9.tar.lzma...

An error occurred:
  source file: Libraries\MiKTeX\Core\win\winFile.cpp
  source line: 686
  message: Permission denied: C:\Program Files\MiKTeX
2.9\miktex/bin/x64/arctrl.exe
  info: C:\Program Files\MiKTeX 2.9\*miktex/bin/x64/arctrl.exe*
------------------------------------------------------------------------------
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