I've two excel file with inside some link to .doc and .pdf file. Both excel files and linked files are on a network shared folder. The first excel file is an .xls, the second an .xlsm.

While opening link to .pdf file is very fast (the file is open in few seconds) it take a long time to open .doc files (about 40 secs.). I have searched on internet but found no solution at the moment.

I have this problem with both excel 2007 and 2010.

Does anyone know how to solve this problem? 

Thanks a lot
Marco