If ever due to some issues, you word .doc files , .docx files, .xls files , .xlsx files basically all popular file extensions of Microsoft Office have their icons missing – here is a quick fix that can resolve the issue.

Go to Start -> Select Microsoft Office -> Microsoft Office Tools ->  Microsoft Office Picture Manager -> Help -> Detect and Repair Р>Check Restore my shortcuts while repairing.

This should restore all the microsoft office shortcuts and icons