If you legally purchased Word 2007 and still have the 25-character product key, you can try to find the original .iso file on reputable software archives (like the Internet Archive), though these can be tricky to find. You would then enter your key during installation. Note: Microsoft has disabled the activation servers for 2007. You may need to activate via phone, but this service has largely been retired.
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This style is for users specifically trying to recover an old purchased copy. If you legally purchased Word 2007 and still