Windows 8 build 8191

6.2.8191.0.fbl_grfx_dev1.120125-1400
	Build of Windows 8
OS family	Windows NT
Version number	6.2
Build number	8191
Build revision	0
Architecture	x64
Build lab	fbl_grfx_dev1
Compiled on	2012-01-25
Expiration date
Timebomb	2013-01-15 (+356 days)
SKUs
	Consumer Preview (Prerelease)
Product key
	H9VCT-63NFW-FWHDR-F4J43-972K8
About dialog

Windows 8 build 8191 is a build of Windows 8, which was shared on 21 October 2024. Prior to its leak, a screenshot of this build was shared on 6 July 2024 on the BetaWiki Discord server.

New features and changes[edit | edit source]

User interface[edit | edit source]

Metro shell[edit | edit source]

The Remote Desktop communications application has been pinned to the start screen.

Bugs and quirks[edit | edit source]

DWM[edit | edit source]

DWM animations can be quite unstable in this build, producing red artifacts instead of the usual animation.

Filesystem mounting support[edit | edit source]

The shell may attempt to invoke a Windows Explorer window that navigates to an unoccupied drive letter before an ISO image is able to finish mounting, in turn displaying an invalid path error. The ISO image will still have mounted normally, and can be accessed through ordinary means. Virtual hard disk (VHD) images are confirmed to not be impacted by this bug.

USB 3.0/xHCI[edit | edit source]

This build appears to have a broken xHCI driver, and therefore will crash during boot if USB 3.0 is enabled. Disabling USB 3.0 for the VM (or from BIOS/UEFI, on real hardware) should fix this problem.