My tablet PC battery ran out while installing this service pack, which has
known problems with rollback. I had to jump through a lot of hoops to get it
to uninstall and leave me in a state where I could reinstall.

One thing that did not recover is the tablet ink. I no longer have the TIP
handwriting panel that used to pop up when the pen gave focus to an edit box.
There is a fusion error in the log, indicating a failure to load the correct
version of tiplibrary.dll.

I've tried repairing various tablet programs to recover it, but nothing has
worked. Where can I find the file, or preferably an msi to repair it?

My system has only tiplibrary.dll v1.7.2600.2657

Fusion log:
Running under executable  C:\Program Files\Common Files\Microsoft
Shared\Ink\TCServer.exe
--- A detailed error log follows.

=== Pre-bind state information ===
LOG: DisplayName = TIPLibrary, Version=1.7.2600.2180, Culture=neutral,
PublicKeyToken=31bf3856ad364e35
(Fully-specified)
LOG: Appbase = C:\Program Files\Common Files\Microsoft Shared\Ink\
LOG: Initial PrivatePath = NULL
LOG: Dynamic Base = NULL
LOG: Cache Base = NULL
LOG: AppName = NULL
Calling assembly : (Unknown).
===

LOG: Processing DEVPATH.
LOG: DEVPATH is not set. Falling through to regular bind.
LOG: Safe mode is set (applyPublisherPolicy=no).
LOG: Host configuration file not found.
LOG: Using machine configuration file from
C:\WINDOWS\Microsoft.NET\Framework\v1.0.3705\config\machine.config.
LOG: Post-policy reference: TIPLibrary, Version=1.7.2600.2180,
Culture=neutral, PublicKeyToken=31bf3856ad364e35
LOG: Cache Lookup was unsuccessful.
LOG: Attempting download of new URL file:///C:/Program Files/Common
Files/Microsoft Shared/Ink/TIPLibrary.DLL.
LOG: Assembly download was successful. Attempting setup of file: C:\Program
Files\Common Files\Microsoft Shared\Ink\TIPLibrary.DLL
LOG: Entering run-from-source setup phase.
WRN: Comparing the assembly name resulted in the mismatch: Revision Number
ERR: The assembly reference did not match the assembly definition found.