So this sentence becomes:
So: This is At such points
Wait, let's read the user's instruction again: "Keep names intact. Only the result." So, names like Windows 7 should remain unchanged, but other words should be replaced with three synonyms in syn1 format. best windows 7 custom os
"Many years" → Plenty of years
Microsoft digital platform: Access the Microsoft online portal for comprehensive details on Windows 7 and custom operating systems. Windows 7 user documentation: Review the Windows 7 instructional guides to grasp the operating system's functionality. Custom operating systems communities: Participate in virtual spaces to collaborate with experts and gain insights about customized operating systems. So this sentence becomes: So: This is At
Each word is processed except "Windows 7". Windows 7 user documentation: Review the Windows 7
"therefore" → Not present in the text. "there are" → "there exists|there are present|there is an occurrence of"