For Office programs that run slowly or even hang because of opening files on a network location, Microsoft has released a fix tool dedicated to fixing the problem, with links to the following tools:
Http://download.microsoft.com/download/2/F/6/2F68E50F-8721-496F-9EF2-C3D35FB5D8BC/MicrosoftFixit50637.msi
We can also try to solve this problem by adding the Enableshelldatacaching key value in the registry:
First, click Win+r, enter "regedit" Return to the Registry Editor, click Ctrl+f, to search the following path key values:
Office 2003:hkey_current_usersoftwaremicrosoftoffice11.0commonopen Find
Office 2007:hkey_current_usersoftwaremicrosoftoffice12.0commonopen Find
After finding the above key value, right-click the right window blank, click "New"-"DWORD Value", and then order this value to enableshelldatacaching.
Finally we just right-click the value-Modify, change "value data" to 1, you can.
The following is the original Microsoft link:
Http://support.microsoft.com/kb/833041/EN-US