这是版本 10.0.10586.122 (th2_release_inmarket.160222-1549) 中 x86 NTDLL.dll 的已知问题.Microsoft 符号服务器上缺少该文件:

this is a known issue with the x86 NTDLL.dll in Version 10.0.10586.122 (th2_release_inmarket.160222-1549). The file is missing on the Microsoft symbol server:

SYMSRV:  Successfully closed the connection to the Server.
SYMSRV:  d:\sym\dl\wn\wntdll.pdb\39814CFBD1A74710A3F8FCAD3D7EC5661\wntdll.pdb not found
SYMSRV:  https://msdl.microsoft.com/download/symbols/wntdll.pdb/39814CFBD1A74710A3F8FCAD3D7EC5661/wntdll.pdb not found
DBGHELP: wntdll.pdb - file not found
*** ERROR: Symbol file could not be found.  Defaulted to export symbols for ntdll.dll - 

我已将其报告给 Microsoft，他们正在调查此问题.

I've already reported it to Microsoft and they investigate the issue.

//更新 2016-03-15

wntdll.pdb 现在在符号服务器上可用:

The wntdll.pdb is now available on the symbol server:

0:000> lmvm ntdll
Browse full module list
start    end        module name
77a70000 77beb000   ntdll      (pdb symbols)   

d:\sym\dl\wn\wntdll.pdb\39814CFBD1A74710A3F8FCAD3D7EC5661\wntdll.pdb


    Loaded symbol image file: ntdll.dll
    Image path: C:\Windows\System32\ntdll.dll
    Image name: ntdll.dll
    Browse all global symbols  functions  data
    Timestamp:        Tue Feb 23 09:23:17 2016 (56CC16F5)
    CheckSum:         001873F8
    ImageSize:        0017B000
    File version:     10.0.10586.122
    Product version:  10.0.10586.122
    File flags:       0 (Mask 3F)
    File OS:          40004 NT Win32
    File type:        2.0 Dll
    File date:        00000000.00000000
    Translations:     0409.04b0
    CompanyName:      Microsoft Corporation
    ProductName:      Microsoft® Windows® Operating System
    InternalName:     ntdll.dll
    OriginalFilename: ntdll.dll
    ProductVersion:   10.0.10586.122
    FileVersion:      10.0.10586.122 (th2_release_inmarket.160222-1549)
    FileDescription:  NT Layer DLL
    LegalCopyright:   © Microsoft Corporation. All rights reserved.