We have lots of reports that have links for our users to be able to download report results in Excel format. We accomplish this by using the Excel mime type in our .asp pages. Sporadically, we are seeing "Unable to read file" errors in Excel 2010 after choosing Open from the IE11 save dialog. Choosing Save/Save As and the file will open just fine.
Also, we can sometimes cause the error to occur more frequently by switching windows during the time when the file is downloading.
If the file is opened directly from /Temporary Internet Files then it opens just fine.
Window 7 64-bit
Thanks in advance!