윈도우 8.1 업데이트 1이 윈도우 업데이트 서버에 올라왔습니다. x86, x64, ARM 버전이 있네요.

설치 순서는 다음과 같습니다.

1. KB2919442 (이미 설치됐을 수도 있음)
2. KB2919355
3. KB2932046
4. KB2937592
5. KB2938439
6. KB2939087

KB2919442:

32비트：http://download.windowsupdate.com/c/msdownload/update/software/crup/2014/02/windows8.1-kb2919442-x86_94ee3d715e732ed28c64b8096327375a35f5d211.msu

64비트：http://download.windowsupdate.com/c/msdownload/update/software/crup/2014/02/windows8.1-kb2919442-x64_f97d8290d9d75d96f163095c4cb05e1b9f6986e0.msu

ARM버전：http://download.windowsupdate.com/c/msdownload/update/software/crup/2014/02/windows8.1-kb2919442-arm_506ed7113697c597c2859d295d562fa4311834ec.msu

KB2919355:

32비트：http://download.windowsupdate.com/c/msdownload/update/software/crup/2014/02/windows8.1-kb2919355-x86_de9df31e42fe034c9a763328326e5852c2b4963d.msu

64비트：http://download.windowsupdate.com/d/msdownload/update/software/crup/2014/02/windows8.1-kb2919355-x64_e6f4da4d33564419065a7370865faacf9b40ff72.msu

ARM버전：http://download.windowsupdate.com/c/msdownload/update/software/crup/2014/02/windows8.1-kb2919355-arm_a6119d3e5ddd1a233a09dd79d91067de7b826f85.msu

KB2932046:

32비트：http://download.windowsupdate.com/c/msdownload/update/software/crup/2014/02/windows8.1-kb2932046-x86_bfd8ca4c683ccec26355afc1f2e677f3809cb3d6.msu

64비트：http://download.windowsupdate.com/d/msdownload/update/software/crup/2014/02/windows8.1-kb2932046-x64_6aee5fda6e2a6729d1fbae6eac08693acd70d985.msu

ARM버전：http://download.windowsupdate.com/c/msdownload/update/software/crup/2014/02/windows8.1-kb2932046-arm_fe6acf558880d127aef1a759a8c2539afc67b5fb.msu

KB2937592:

32비트：http://download.windowsupdate.com/d/msdownload/update/software/crup/2014/02/windows8.1-kb2937592-x86_96a3416d480bd2b54803df26b8e76cd1d0008d43.msu

64비트：http://download.windowsupdate.com/c/msdownload/update/software/crup/2014/02/windows8.1-kb2937592-x64_4abc0a39c9e500c0fbe9c41282169c92315cafc2.msu

ARM버전：http://download.windowsupdate.com/c/msdownload/update/software/crup/2014/02/windows8.1-kb2937592-arm_860c83a0cccc0519111f57a679ae9f9d071315e5.msu

KB2938439:

32비트：http://download.windowsupdate.com/c/msdownload/update/software/crup/2014/03/windows8.1-kb2938439-x86_ac9aca7e41c8e818edbea0a8026189ee086f7aa2.msu

64비트：http://download.windowsupdate.com/c/msdownload/update/software/crup/2014/03/windows8.1-kb2938439-x64_3ed1574369e36b11f37af41aa3a875a115a3eac1.msu

ARM버전：http://download.windowsupdate.com/d/msdownload/update/software/crup/2014/03/windows8.1-kb2938439-arm_4a536d9ddcd9993cbe4fbc309ebd50a18d65f954.msu

KB2939087:

32비트：http://download.windowsupdate.com/d/msdownload/update/software/crup/2014/03/windows8.1-kb2939087-x86_922410536df105c716a323b0a67956988aa17f40.msu

64비트：http://download.windowsupdate.com/d/msdownload/update/software/crup/2014/03/windows8.1-kb2939087-x64_89d4949cd698c645c7a6e96a012eecab44d5c5e1.msu

ARM버전：http://download.windowsupdate.com/d/msdownload/update/software/crup/2014/03/windows8.1-kb2939087-arm_53005551079dfe5ad4d03f85768801c794cedb60.msu