I have a number of pre-made envelopes setup for printing. Envelopes are now not printing out properly on the page, the print placement has shifted and the return address is only partly there. I have checked the settings and margins everything appears to be correct, (although it appears like some setting has changed along the way), the envelope size is properly picked and it's placement for the printer (hp laser jet) is correct. I have also tried restarting windows.

Without more detail of what the problem is ("not printing out properly on the page" isn't exactly descriptive), information about the envelope sizes and type of printer, no-one is likely to be able to give specific advice. Contrary to what you believe, it is unlikely to have 'just happened' without some settings being changed.

As a first step, try re-starting Windows and seeing if the problem resolves itself.

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Cheers,
Paul Edstein
[Fmr MS MVP - Word]