Excel Issue
 

I have a user here who when they attempt to open up an excel file it either
comes up and says the file is in use and opens in read only or it comes up
file is missing.They then close excel and go back into it a second time and
it then will open for them this is with any excel file and happens on all of
them. Does not matter if the file is on a network share or stored locally. I
am not sure what is causing this as no other machines are having issues with
this. This is with Office 2007 and Vista any help would be great !