Microsoft offered a free upgrade path from genuine Windows 7 to Windows 10 (still unofficially working in 2025). Windows 11 requires newer hardware but is far more secure.
While the "Intitle Index Of" method is a classic trick for finding files, it is rarely successful for activation in 2024 and beyond. Most public keys are blacklisted. Your best bet is to find your original hardware sticker or consider moving to a newer, supported version of Windows for better security. Microsoft offered a free upgrade path from genuine