A default template has accidentally been made and continues to open on start up of Excel. How can I delete a default template in 2010?
There are multiple places to check. See the list under the third option on this page:
It says Excel 2003 but apparently this is still applicable.
Unlike Word, Excel doesn't have a Normal template.
What you can look for however is Book.xlt/.xltx/.xltm and Sheet.xlt/.xltx/.xltm under
Book.xlt is used as the basis for new workbooks, and similarly Sheet.xlt is used as the basis for new worksheets added to existing workbooks.