Windows Umbriel

Windows Umbriel was the only version of Windows fully intended for Schools
=== Builds ===
You can add builds but make sure they don't go past 3133. You will get credit for it.
==== Pre-Development ====
==== Developer Release ====
5.5.2428 (Available)
5.5.2433 (Available)
5.5.2437 (Confirmed)
5.5.2441 (Unconfirmed)
5.5.2444 (Confirmed)
5.5.2445 (Available)
5.5.2449 (Unconfirmed)
5.5.2450 (Fake)
5.5.2456 (Confirmed)
5.5.2459 (Fake)
5.5.2460 (Unconfirmed)
5.5.2466 (Confirmed)
5.5.2470 (Available)
5.5.2472 (Fake)
5.5.2475 (Available)
5.5.2481 (Confirmed)
5.5.2488 (Fake)
5.5.2490 (Unconfirmed)
5.5.2493 (Confirmed)
5.5.2500 (Available)
5.5.2506 (Confirmed)
5.5.2507 (Unconfirmed)
5.5.2511 (Unconfirmed)
5.5.2515 (Unconfirmed)
5.5.2517 (Available)
5.5.2521 (Available)
5.5.2524 (Confirmed)
5.5.2529 (Confirmed)
5.5.2539 (Confirmed)
5.5.2540 (Available)
5.5.2549 (Available)
5.5.2555 (Available)
5.5.2558 (Confirmed)
5.5.2561 (Confirmed)
5.5.2573 (Unconfirmed)
5.5.2575 (Confirmed)
5.5.2579 (Available)
5.5.2580
5.5.2584
5.5.2589
5.5.2593
5.5.2595
5.5.2599
5.5.2600
5.5.2602
5.5.2604
5.5.2609
5.5.2610
5.5.2611
5.5.2614
5.5.2617
5.5.2620
5.5.2623
5.5.2625
5.5.2633
5.5.2636
5.5.2640
5.5.2641
5.5.2645
5.5.2646
5.5.2649
5.5.2650
More builds coming soon
==== SP1 Beta ====