Windows Calendar is a calendar application that is included in Windows Vista. It natively supports the iCalendar file format, and has the ability to publish and subscribe to web-based calendars by using HTTP and WebDAV. Calendars may also be published to network drive shares.
Windows Calendar has several calendar views, including Day, Week (5 and 7 day) and Month, and also supports Tasks. Windows Calendar supports over 100 calendars for each user. However, Windows Calendar lacks extensibility through APIs or extensions and there is no way to allow applications to use the Windows Calendar store.
Several problems have already been seen in Windows Calendar, here is an example of one;
You create an appointment and a new task in Windows Calendar on a Windows Vista-based computer. However, when you restart the computer, you receive an error message that resembles the following:
Windows Calendar has stopped working
A problem caused the program to stop working correctly. Windows will close the program and notify you if a solution is available.
Additionally, an error message that resembles the following may be logged in the Application log:
Event Type: Error
Event Source: Application Error
Event ID: 1000
Description:
Faulting application WinCal.exe, version 6.0.6000.16386, time stamp 0x4549b140, faulting module WinCal.exe, version 6.0.6000.16386,time stamp 0x4549b140, exception code 0xc0000005,fault offset 0x0004d6ea, process id 0x179c, application start time 0x01c761104a05e707.
A supported hotfix is now available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next service pack that contains this hotfix.
Alternatively you can try cleaning up your Windows Vista Registry which will stop Windows Calendar errors, click here to download.
