Pixma 3000 series printer suddenly not printing envelopes correctly

[Cango-on]

Hi--I am feeding in the envelope in as I always do & the return address is at the center of the top of the envelope & the address which should be centered on the envelope is top left where return address should be???  Just did a Windows 10 update.  Pages are still printing normally.  I didn't really change anything in settings.  I adjusted font a bit.  Can anyone help please?  
I see Microsoft updates have caused printer issues in the past.
Thank you for any help you can provide! 
🙂

[Danny]

Thanks for joining the conversation, Cango-on!

So that the Community can help you better, we need to know exactly which specific Canon printer model you're using.  The model number should appear on the front or top of the unit. That, and any other details you'd like to give will help the Community better understand your issue!

If this is a time-sensitive matter, click HERE search our knowledge base or find additional support options HERE.

Thanks and have a great day!