Select the window you don't want anymore.
hit ctrl-w to close it.
Save the workbook the way you like.

Debra Dalgleish has some instructions with pictures:
http://contextures.com/xlfaqApp.html#TwoWindows

Wanna Learn wrote:

Hello I have a report that I open daily to update the stats. but lately
when I open the report a second copy of the report opens. Dailystats.xls:1
and another report Dailystats.xls:2 How do I correct this? thanks in
advance

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Dave Peterson