Microsoft Word 2007 crashes

Iam using microsoft office 2007 on windows 8.1. Every thing was going on perfectly but yesterday my WORD started crashing. When ever i try to open it it says "there was a problem while sending command o the program". I have used fix it many times and what happens that RESOLVING PROBLEM keep on going on and on and on and never ends.

note: Other apps of office 2007 are working perfectly except word 2007

Kindly please solute this issue as soon as possibe

[Moderator note: Changed title from "Microsoft word 2007"]

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