In case the application complains about MSCOMCTL.OCX missing on your system, which isn't likely unless you don't have much software installed, here is what to do:
1. Download a copy of MSCOMCTL.OCX from
here (495 KB). (I uploaded my own copy because every other one I found available for download was of a version that was about five years old.)
2. Extract MSCOMCTL.OCX to your
%systemroot%\system32 directory (usually
C:\WINDOWS\system32).
3. Click
Start, then
Run.
4. In the
Open text box of the
Run dialog, enter this command, and click OK:
regsvr32 mscomctl.ocxYou should see a dialog telling you that MSCOMCTL.OCX was correctly registered. The calendar application should then run fine.