Excel not opening in Microsoft Office Professional 2007.

Excel will open, but only after several tries or waiting a long period for it to open. I uninstalled and reinstalled my M.O.P. 2007 from my CD and Excel was opening fine after a clean install. Several days later the Excel was having problems opening again. Support for M.O.P. 2007 has expired, but is it possible that somehow it is still being updated? I have uninstalled and reinstalled the program 3 times with the same results. Is there a way to stop any changes to my freshly installed program? I have tried the safe mode method, but can't find the file option. (I did find some Excel add-ins under Customize Quick Access Toolbar.)(I did find that not closing the blank Excel file and re-clicking the desired file opened the file, but sometimes an hour glass hindered the file opening.)