Windows 8 Build 8220.0.winmain win8beta.120127-1925：修订间差异
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Windows 8 Build 8220.0.winmain win8beta.120127-1925 (查看源代码)
2025 年 1 月 20 日 (一) 21:36 的版本
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As the build comes from a public release branch intended for the official Consumer Preview release, several anti-leak mechanisms have been relaxed. | As the build comes from a public release branch intended for the official Consumer Preview release, several anti-leak mechanisms have been relaxed. | ||
== New features and changes == | |||
=== User interface === | |||
==== Metro shell ==== | |||
The PC settings pinned application tile has been removed from the Start screen and the apps list; the only way to access the application at the time of compilation is through the Settings charm. | |||
=== Boot Graphics Library (BGFX) === | |||
The Boot Graphics Library has been updated to accommodate for legacy BIOS machines utilizing a widescreen monitor configuration; the boot screen, system crash screen and the second stage of setup therefore utilize 16:9 aspect ratio variants of the logo bitmap and Segoe Boot font face, with resources designated under the N moniker. | |||
=== Secure Boot Policy === | |||
This build uses a preliminary version of the Secure Boot Policy, although the on-disk structure is identical to later builds: | |||
* Signature validation is different: the policy must have a hash in or be signed by a certificate in the UEFI Key Exchange Key signature database. | |||
* The CanUpdate element is used here; the code using it was removed later but the element remained in the file format. A path to an updated policy can either be set in a UEFI variable; alternatively, for BitLocker where the VMK is sealed by the TPM, an updated policy is read from osdevice:\LatestPolicy.p7b. This policy must have a valid signature. | |||
* The updated policy must have a PolicyPublisher equal to one of the CanUpdate GUIDs in the loaded policy; also, the policy version must be greater than the loaded policy's version. If all conditions pass, the updated policy is installed to UEFI non-volatile storage and used as the active policy. | |||
* BCD rules are identical to later builds; that is, BCD elements can be overridden by the policy to either be forcibly ignored, or for deletion to be disallowed from the running OS, or for the element value to be locked to a value or one of several values listed in the policy. | |||
* Registry rules are not used for low-level cryptographic settings as in later builds but instead are used to override registry values anywhere in HKLM\SYSTEM. The operating system loader winload.e* and NT kernel both have code implementing this functionality; the former uses the policy to override the registry values it reads from that hive. | |||
* Option flag bits are completely different from later builds; only 3 bits are used, all by the operating system loader; bit 0 disables the Edit Options menu, bit 1 disables the Advanced Options menu, bit 2 is unknown but related to the Advanced Options menu. | |||
=== Miscellaneous === | |||
* The shutdown sound no longer plays when the operating system is being shutdown by the user. | |||
== Bugs and quirks == | |||
As this build was compiled relatively late into preparations for the upcoming Consumer Preview release, some stability, performance and usability issues are also present in this build. | |||
=== Filesystem mounting support === | |||
* 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. | |||
=== Desktop Window Manager === | |||
* Attempting to use the Magnifier accessibility tool will create graphical artifacts across windows composited by the Desktop Window Manager. | |||
=== Recovery === | |||
* The System Reset tool does not function as the respective modal prompt for removing user data does not display properly. | |||
=== User interface === | |||
==== Internet Explorer ==== | |||
* Elements of the new Internet Explorer user interface may fail to adequately respond to user inputs, appearing to "hang" at times. | |||
==== Control Panel ==== | |||
* Adding a new language (such as Japanese) will cause the Control Panel to hang. The only way to fix this is by restarting the Windows Explorer shell. | |||
* Devices are not correctly detected in the PC settings application - as a result, its respective tab will constantly redraw itself when populating devices. Attempting to manually add a device through the Devices tab will consequentially crash the application. | |||
==== Compatibility ==== | |||
To install or run this build in VMware Workstation, the hardware compatibility must be set to version 9.x or 8.x; otherwise, a bugcheck will occur. | |||
== Gallery == | == Gallery == | ||