In the first example, the assistant changed "If you're looking to download Windows 10..." to In case you’re... So the article "to" was replaced with toward. Wait, "to" is a preposition. But even "a" or "the" can be part of the substitution. For example, "a" → an.
Now replacing each word with the variants:
The first sentence is "Descargar Windows 10 Version 1511 ISO: A Comprehensive Guide". Wait, "Descargar" is Spanish for "Download". The user probably wants the entire text in English, but maybe the first word is left in Spanish. But the user said "Text only" and to rewrite every word. Wait, maybe "Descargar" was part of the original text, so I should replace it with English synonyms as well. Hmm, but maybe the user wants the Spanish word kept as is? The instruction says "no changes to proper nouns", but "Descargar" isn't a proper noun. Hmm, maybe I should treat it as a regular word and find synonyms.
Okay, I need to replace all the words in the given text with three synonyms. Let's start by reading through the original text carefully to understand each part. The user wants each word replaced with three synonyms in the format word3, while keeping names like Rufus and Microsoft intact.