Excel 2007 opening files slow & errors

Excel 2007 opening files
slow & errors"):
>>> I had the same problems with Excel either opening XLS and XLSX files
>>> slowly or not at all. I just fixed the file associations for both of
>>> them. Here is what I did.
>>>
>>> 1) Open an Explorer window and click Folder Option, then File Types.
>>> Scoll down to either XLS or XLSX file type (you need to do the same
>>> for both of them)
>>>
>>> 2) Once you has XLS (or XLSX) selected, then click Advanced.
>>>
>>> 3) Click on the OPEN action and then click Edit.
>>>
>>> 4) Under the Application to use box it probably says "....Microsoft
>>> Office\Office12\EXCEL.EXE" /e" or something similar. Replace the /e
>>> with "%1" (including the quotes). so it should now look like this:
>>> "...Microsoft Office\Office12\EXCEL.EXE" "%1"
>>>
>>> 5) You can uncheck the "Use DDE" also.
>>>
>>> Once that is done close out of all those screen and try to open the
>>> XLS (or XLSX depending on what which one you changed) and it would
>>> open right up in Excel. This fixed the problems I was having.