If Debraj's solution doesn't help
Excel may have also added a start up default path to the Shortcut you use to start Excel
Right click on the Shortcut, select Properties
Look in the Start In directory for xl5galry.xls
If that doesn't help It could also be set in the registry or by an Excel Addin
If you find the file xl5galry.xls rename it to xl5galry.xls.orig temporarily
Just in case Excel 2010 etc still needs it
Excel may have also added a start up default path to the Shortcut you use to start Excel
Right click on the Shortcut, select Properties
Look in the Start In directory for xl5galry.xls
If that doesn't help It could also be set in the registry or by an Excel Addin
If you find the file xl5galry.xls rename it to xl5galry.xls.orig temporarily
Just in case Excel 2010 etc still needs it