# Install wget for windows http://downloads.sourceforge.net/gnuwin32/wget-1.11.4-1-setup.exe
# Edit username, password, wget path, pages, albumname, and source URL
# Save file as download.ps1, open powershell as admin, run this command once Set-ExecutionPolicy Unrestricted, then run the script
$username = "username@email.com"
$password = "password"
$wget = "C:\Program Files (x86)\GnuWin32\bin\wget.exe"
$pages = 18
$albumname = "61485986\"
$source = "http://i3.pixiv.net/img-original/img/2017/02/16/17/29/58/61485986"
& $wget --keep-session-cookies --save-cookies="c:\cookies_pixiv.net.txt" --no-check-certificate --post-data "mode=login&return_to=http://www.pixiv.net&pixiv_id=$username&pass=$password" 'https://accounts.pixiv.net/api/login?lang=en' -O -

For ($i=0; $i -le $pages; $i++) {
$finalsource = $source + "_p$i.jpg"
$dest = "c:\pixiv\images\$albumname"
& $wget --load-cookies "c:\cookies_pixiv.net.txt" --header="Referer: http://spapi.pixiv.net/"  $finalsource -P $dest
}