Personal.xls ia your personal macro workbook.
You must have recorded a macro and selected personal macro workbook as the file
to store it in.
You can delete this file from your XLSTART folder usually located at
C:\Documents and Settings\username\Application Data\Microsoft\Excel\XLSTART
OR....keep it and let it open.
When it is open, go to Window>Hide and select Personal.xls.
Save changes to Personal.xls when you close Excel.
Personal.xls will now open "hidden" and any macros in it will be available for
all workbooks, which it was designed for.
Gord Dibben MS Excel MVP