Offline installation files to update Windows 8 to Windows 8.1

Within the ZIP archive (32-bit or 64-bit) you will find six updates, which should be installed in the following order: KB2919442, KB2919355, KB2932046, KB2937592, KB2938439, KB2949618.

Alternatively you can use the following commands to install them in one go, without reboot.

32-bit:
wusa.exe Windows8.1-KB2919442-x86.msu /quiet /norestart
wusa.exe Windows8.1-KB2919355-x86.msu /quiet /norestart
wusa.exe Windows8.1-KB2932046-x86.msu /quiet /norestart
wusa.exe Windows8.1-KB2937592-x86.msu /quiet /norestart
wusa.exe Windows8.1-KB2938439-x86.msu /quiet /norestart
wusa.exe Windows8.1-KB2949618-x86.msu /quiet

64-bit:
wusa.exe Windows8.1-KB2919442-x64.msu /quiet /norestart
wusa.exe Windows8.1-KB2919355-x64.msu /quiet /norestart
wusa.exe Windows8.1-KB2932046-x64.msu /quiet /norestart
wusa.exe Windows8.1-KB2937592-x64.msu /quiet /norestart
wusa.exe Windows8.1-KB2938439-x64.msu /quiet /norestart
wusa.exe Windows8.1-KB2949618-x64.msu /quiet