Excel file located on network, all the files are slow but some are worse than others to the extent that it says the program is not responding but it will eventually open (sometimes as long as 5 minutes)
First, simply check if you have the microsoft Update of kb2541025 or kb2502786. If you find them, then uninstall them one by one and test. This should fix the most cases.
Else try the microsoft Fix it for me.
another problem-causing solution from the great M$. All the time, the solution will not comes from M$, instead the solution always comes else where.