Windows 10 Cobalt

Windows 10 Cobalt is a development cycle of the Microsoft Windows 10 operating system.

Pre-Insider Preview

 * 10.0.21245.1000.rs_prerelease.201023-1355
 * 10.0.21246.1000.rs_prerelease.201024-2007
 * 10.0.21264.1000.rs_prerelease.201117-1315
 * 10.0.21268.1000.rs_prerelease.201123-1408
 * 10.0.21270.1000.rs_prerelease.201126-1100
 * 10.0.21274.1000.rs_prerelease.201202-1418