Crystal Reports and Windows Updates

We are currently using the 2006 version of Timeslips on Windows XP,SP3 computers with the shared data residing on a 2003 server.   Recently, we had an issue where Windows updates were not being installed on workstations (servers were fine) as we thought, so about a week ago, we had to manually install all the patches on all workstations from the last 6 months or so.

After the updates, Timeslips reporting was behaving querky on random computers - mostly just not generating a report.  On some, a reboot fixed it, on others a reinstall fixed it.  Today was especially disturbing when two people ran the exact same report and got different outcomes.  This now went from a querky issue to a serious one.

Timeslips 2006 runs Crystal Reports (do not know which version).  I have noted with another piece of custom software running Crystal Reports 9 that we had issues installing this software on a Windows 7 machine.  

So now the big question:  Does anyone know if there have been reports of conflicts with Crystal Reports (any version) and any windows updates that came out POST SP3?  I'm hoping to roll back that update on all the workstations until we have a new billing program.   .NET updates were part of the updates we did - I k now I saw updates to .NET 3.5.

Any help would be appreciated.