Using a Trusted Location in Excel 2007/2010
By setting a Trusted Location in Excel 2007/2010, you can avoid having to enable macros every time the TimeTracker file is opened.
1. Click the Microsoft Office Button 
, and then click Excel
Options.
2. Click Trust Center, and then click Trust Center
Settings.
3. Click on Trusted Locations.
4. Click on Add New Location to specify the location the TimeTracker
file is saved in as a trusted location.
NOTE: Trusted locations are not available in other versions of Excel.