On a Windows 8.1 (90-day Trial) DVD ("IR3_CENA_X64FREE_EN-US_DV9"); downloaded from Microsoft®, we found it in:

   \boot\bootsect.exe
    Tuesday, March 18, 2014, 4:29:37 AM     109,408 bytes
    File Version: 6.3.9600.16384 (winblue_rtm.130821-1623)
    Offsets:  0x011870 through 0x011A6F
   
   \sources\winsetup.dll
    Tuesday, March 18, 2014, 4:29:37 AM   3,074,560 bytes
    File Version: 6.3.9600.17031 (winblue_gdr.140221-1952)
    Offsets:  0x02C2280 through 0x02C247F

And in the C: drive of the installation it created:

Windows\System32\bootsect.exe
    Offset: 0x011870
    MBR type: Win7/8
    Platform: x64
    Modified: 8/22/2013 12:45:34 PM
    Size: 109408
    Version: 6.3.9600.16384 (winblue_rtm.130821-1623)
    Company: Microsoft Corporation
    Description: Boot Sector Manipulation Tool

Windows\System32\storagewmi.dll
    Offset: 0x22C180
    MBR type: Win7/8
    Platform: x64
    Modified: 3/18/2014 10:05:58 AM
    Size: 2395136
    Version: 6.3.9600.17031 (winblue_gdr.140221-1952)
    Company: Microsoft Corporation
    Description: WMI Provider for Storage Management

Windows\System32\vdsutil.dll
    Offset: 0x01C4B0
    MBR type: Win7/8
    Platform: x64
    Modified: 3/18/2014 10:05:07 AM
    Size: 130048
    Version: 6.3.9600.17031 (winblue_gdr.140221-1952)
    Company: Microsoft Corporation
    Description: Virtual Disk Service Utility Library

Windows\System32\vssapi.dll
    Offset: 0x14E840
    MBR type: Win7/8
    Platform: x64
    Modified: 8/22/2013 9:20:21 AM
    Size: 1558528
    Version: 6.3.9600.16384 (winblue_rtm.130821-1623)
    Company: Microsoft Corporation
    Description: Microsoftr Volume Shadow Copy Requestor/Writer
                 Services API DLL

Windows\System32\drivers\spaceport.sys
    Offset: 0x027D20
    MBR type: Win7/8
    Platform: x64
    Modified: 3/18/2014 10:04:54 AM
    Size: 384856
    Version: 6.3.9600.17031 (winblue_gdr.140221-1952)
    Company: Microsoft Corporation
    Description: Storage Spaces Driver


SAME FILE IN A DIFFERENT LOCATION:
(as many others below will be too)
=================================

Windows\System32\DriverStore\FileRepository\spaceport.inf_amd64_a738a79007186524\spaceport.sys
    Offset: 0x027D20
    MBR type: Win7/8
    Platform: x64
    Modified: 3/18/2014 10:04:54 AM
    Size: 384856
    Version: 6.3\bootsect.exe
    Offset: 0x011870
    MBR type: Win7/8
    Platform: x64
    Modified: 8/22/2013 12:45:34 PM
    Size: 109408
    Version: 6.3.9600.16384 (winblue_rtm.130821-1623)
    Company: Microsoft Corporation
    Description: Boot Sector Manipulation Tool

Windows\WinSxS\amd64_microsoft-windows-setup-component_31bf3856ad364e35_6.3.9600.17031_none_231dd09d8113997d\winsetup.dll
    Offset: 0x2C2280
    MBR type: Win7/8
    Platform: x64
    Modified: 3/18/2014 10:05:08 AM
    Size: 3074560
    Version: 6.3.9600.17031 (winblue_gdr.140221-1952)
    Company: Microsoft Corporation
    Description: Windows System Setup

Windows\WinSxS\amd64_microsoft-windows-storagemanagementwmi_31bf3856ad364e35_6.3.9600.17031_none_41dd56001e62dcc5\storagewmi.dll
    Offset: 0x22C180
    MBR type: Win7/8
    Platform: x64
    Modified: 3/18/2014 10:05:58 AM
    Size: 2395136
    Version: 6.3.9600.17031 (winblue_gdr.140221-1952)
    Company: Microsoft Corporation
    Description: WMI Provider for Storage Management

Windows\WinSxS\amd64_microsoft-windows-virtualdiskservice_31bf3856ad364e35_6.3.9600.17031_none_5bdc24eece7fed1f\vdsutil.dll
    Offset: 0x01C4B0
    MBR type: Win7/8
    Platform: x64
    Modified: 3/18/2014 10:05:07 AM
    Size: 130048
    Version: 6.3.9600.17031 (winblue_gdr.140221-1952)
    Company: Microsoft Corporation
    Description: Virtual Disk Service Utility Library

Windows\WinSxS\amd64_microsoft-windows-vssapi_31bf3856ad364e35_6.3.9600.16384_none_c5a53e5b55b8b1c2\vssapi.dll
    Offset: 0x14E840
    MBR type: Win7/8
    Platform: x64
    Modified: 8/22/2013 9:20:21 AM
    Size: 1558528
    Version: 6.3.9600.16384 (winblue_rtm.130821-1623)
    Company: Microsoft Corporation
    Description: Microsoftr Volume Shadow Copy Requestor/Writer
                 Services API DLL

Windows\WinSxS\amd64_spaceport.inf_31bf3856ad364e35_6.3.9600.17031_none_06c9136a2a4aa9b8\spaceport.sys
    Offset: 0x027D20
    MBR type: Win7/8
    Platform: x64
    Modified: 3/18/2014 10:04:54 AM
    Size: 384856
    Version: 6.3.9600.17031 (winblue_gdr.140221-1952)
    Company: Microsoft Corporation
    Description: Storage Spaces Driver

Windows\WinSxS\wow64_microsoft-windows-storagemanagementwmi_31bf3856ad364e35_6.3.9600.17031_none_4c32005252c39ec0\storagewmi.dll
    Offset: 0x132148
    MBR type: Win7/8
    Platform: I386
    Modified: 3/18/2014 10:05:58 AM
    Size: 1403392
    Version: 6.3.9600.17031 (winblue_gdr.140221-1952)
    Company: Microsoft Corporation
    Description: WMI Provider for Storage Management

Windows\WinSxS\wow64_microsoft-windows-vssapi_31bf3856ad364e35_6.3.9600.16384_none_cff9e8ad8a1973bd\vssapi.dll
    Offset: 0x0DD218
    MBR type: Win7/8
    Platform: I386
    Modified: 8/22/2013 2:25:20 AM
    Size: 1117184
    Version: 6.3.9600.16384 (winblue_rtm.130821-1623)
    Company: Microsoft Corporation
    Description: Microsoftr Volume Shadow Copy Requestor/Writer
                 Services API DLL