I would disable it as a startup program. I provided a relevant link in your other thread, but also check the Startup folder in the Start Menu and select the WinCal (Windows Calendar) entry if there is one there. It won't fix the program, but it will remove the annoyance.
Hope this helps,
John
Each time I start up my computer, it shows the not responding screen for Windows Calendar.
Do you know why it keeps showing up,
A month or two ago I just wanted to try out the program Windows Calendar, so I only added one event for a day on the calendar, and I removed it.
Is there a setting I need to check.
Sorry for not being so much detail about this,
Any suggestions you might give me to check and find out this problem ?

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