If you apply a hotfix that is not compatible with Terminal Server, to a Terminal Server computer, your server will not function properly.

To determine if a hotfix is compatible with Terminal Server:

1. If it is a self extracting exe, expand it with the /x switch.

2. Use FILEVER.EXE, from the Resource Kit, to display the FileVer property of the VS_FIXEDFILEINFO structure. Type filever /v filename. Sample:

  filever /v apimon.exe
  --a-- W32i APP ENU  4.0.1381.32772 shp    184,080 06-16-1998 apimon.exe
       Language        0x0409 (English (United States))
       CharSet         0x04b0 Unicode
       OleSelfRegister Disabled
       CompanyName     Microsoft Corporation
       FileDescription API Monitor Debugger
       InternalName    apimon.exe
       OriginalFilenam apimon.exe
       ProductName     Microsoft(R) Windows NT(TM) Operating System
       ProductVersion  4.00
       FileVersion     4.00
       LegalCopyright  Copyright (C) Microsoft Corp. 1981-1998

       VS_FIXEDFILEINFO:
       Signature:      feef04bd
       Struc Ver:      00010000
       FileVer:        00040000:05658004 (4.0:1381.32772)
       ProdVer:        00040000:05658004 (4.0:1381.32772)
       FlagMask:       0000003f
       Flags:          00000000
       OS:             00040004 NT Win32
       FileType:       00000001 App
       SubType:        00000000
       FileDate:       00000000:00000000
3. If the FileVer shows a hex version where the last 2 bytes are 8000 or greater, the file was built for Terminal Server. The decimal version will exceed 32767. In the example above, the last 2 bytes are 8004, while the decimal version is 32772.