Hello,
Do you get any error message which indicates that the files are corrupted? Along with Word, Excel files, are there also .pst files? If yes, refer to the following technote in order to resolve the problem:
Title: Terminating the Desktop and Laptop Option client during the backup of a Microsoft Personal Folders File (pst) may cause corruption of the .pst file.
http://support.veritas.com/docs/269284
For additional infomation on restoring DLO, refer to Pages 1219-1223 in the administrator's manual for Backup Exec 9.1. Here is the link for the download:
http://support.veritas.com/docs/266190
Hope this helps. In case of further doubts, revert with details on the exact error message.
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Regards.