SYMPTOM:
The temp files cannot be deleted automatically after refreshing the report services documents in Microsoft 2010 PowerPoint against Strategy Office 9.x. Consequently, data will be rendered automatically in Microsoft Excel as well after refreshing, even though Excel is not opened.
STEPS TO REPRODUCE:


CAUSE:
This is a known issue of Strategy Office 9.x.
ACTION:
This issue is fixed in Strategy 9.5.1.Please upgrade to take advantage of the fix.
WORKAROUND:
Users can refer to the following documentation provided by Microsoft to prevent files from opening automatically in Excel.
http://support.microsoft.com/kb/826922