In "Use a Product Key Recovery Tool," maybe "Use," "Utilize," "Employ," "Apply." "Several third-party tools available" – "available" again. "Scan your computer and retrieve your key" – "retrieve" could be "recover," "extract," "obtain." "Computer" as "PC," "laptop," "device."
"Email" could be e-letter. "Digital copy" might need software download. Windows 8.1 Embedded Industry Pro Product Key
Wait, "25-character code" as a noun phrase. Maybe replace the entire phrase, but the user wants each individual word to be replaced. So "25-character code" would be split into "25-character" and "code". But "code" can be replaced with synonyms like "sequence", "string", "key". In "Use a Product Key Recovery Tool," maybe
What to Do if You Mislay Your Product Key If you misplace or mishandle your product key, do not fret. There are several options available to help you obtain it: Wait, "25-character code" as a noun phrase