|The normal.dot is associated only with Word. I would remove all instances of that file, then try and reopen Word.|
Again, are you trying to open a Word Document that you've already saved?
What messages are you receiving in Excel and Powerpoint, and again, are you trying to open Workbooks and Presentations that you've already saved?
"So won’t you give this man his wings
What a shame
To have to beg you to see
We’re not all the same
What a shame" - Shinedown