‎Windows 8 Build 7850.0.winmain_win8m1.100922-1508

7850.0.winmain_win8m1.100922-1508
	Windows 8 的版本
操作系统系列	Windows NT 系列
NT 版本	Windows NT 6.1
内部版本号	7850
修订版本号	0
体系结构	x86, x64, ARM32
内部版本实验室	winmain_win8m1
编译日期	2010 年 9 月 22 日
有效期
时间炸弹	2011 年 2 月 5 日（+136 天）
关于对话框

首页 > Microsoft Windows 通述 > Windows 客户端 > Windows 8 > ‎Windows 8 Build 7850.0.winmain_win8m1.100922-1508

Windows 8 build 7850 is the official Milestone 1 build of Windows 8, which was originally uploaded to BetaArchive as an x86 Enterprise SKU version on 12 April 2011,^[1] then on 17 January 2015, an x64 version of this build was uploaded to the aforementioned website along with additional SKUs for both the x86 and x64 architectures and its server counterpart.^[2] A screenshot of the Simplified Chinese language pack for this build was uploaded onto the Chinese forum Baidu Tieba on 12 June 2020.^[3] Being very early in development, many areas still include the Windows 7 branding and the operating system still uses the version number of 6.1. Files from the ARM32 compile of this build were discovered on the Microsoft Symbol Server on 24 May 2022.

This build utilizes a valid SHA-1 production-signing certificate (signed by the Microsoft Windows Verification PCA certificate chain, associated with Windows Hardware Quality Labs (WHQL)) and can be booted and installed on the current date.

SKU 版本和密钥

SKU 版本	密钥
Starter	7Q28W-FT9PC-CMMYT-WHMY2-89M6G
Home Basic	YGFVB-QTFXQ-3H233-PTWTJ-YRYRV
Home Premium	RHPQ2-RMFJH-74XYM-BH4JX-XM76F
Professional	HYF8J-CVRMY-CM74G-RPHKF-PW487
Enterprise	H7X92-3VPBB-Q799D-Y6JJ3-86WC6
Ultimate	D4F6K-QK3RD-TMVMJ-BBMRX-3MBMV

New features and changes

EULA Hash / Hash ID

shell32.dll has code to print the hash ID in the about box and desktop watermark, which appears to fail in this build (hash ID is only printed if the function to obtain it succeeded). The public symbols for this build give a mangled name for this function as bool GetEulaHash(wchar_t*, size_t), although compiler or link-time optimizations removed and inlined the second argument (length of output string buffer in characters). The function retrieves the default value in the registry key HKLM\SYSTEM\WPA\478C035F-04BC-48C7-B324-2462D786DAD7-5P-9. This value must be REG_BINARY of size 128 bytes; this data is split into eight 16-byte buffers, Hash[n] is equal to the nth byte of each of the buffers XORed together.

Kernel

This build re-introduces support for 32-bit UEFI boot, which was absent since Windows Vista post-reset development.

Also integrated support for booting from an exFAT partition, along with 4K Native logical sector and Hybrid boot.

Bugs and quirks

General

On some machines, installing this build is not possible due to a 0x7F bugcheck.
Some graphics drivers may prevent the system from booting and will result in an ATTEMPTED_EXECUTE_OF_NOEXECUTE_MEMORY or a SYSTEM_SERVICE_EXCEPTION bugcheck.

Installation

On some machines, upgrading to this build is not possible due to an error when booting into the OOBE.
The last word of status messages shown when starting Setup and before the computer reboots into OOBE is cut off.
Setup may hang when restarting after the hardware portion. Restarting the machine will fix it.

DWM and Aero

Due to changes that are incompatible with the graphics stack, to get the Aero functionalities to work on VMware Workstation versions 14.0 and above, set hardware compatibility to Workstation 9.x. However, Aero doesn't persist when logging off and logging back on.
Only the top portion of the window frame is blurred when using the Windows Aero theme, leaving the side borders transparent.