Download Net Framework 3.1 For Windows Xp Sp2 Offline Installer | ULTIMATE |

You can install:

Note: Windows XP SP2 is very outdated. Some later .NET versions (like 4.5+) require SP3 or are not supported at all. You can install:

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If you need a truly hands‑free, no‑internet install: Note: Windows XP SP2 is very outdated

dotnetfx35.exe /q /norestart

Add /lang:enu for English only (smaller footprint). If you need a truly hands‑free, no‑internet install:

While the direct XP link is dead, the following filename is the authentic, digitally signed offline installer:

Filename: dotnetfx35.exe (Full offline; ~231 MB)
SHA1 Signature: This file is signed by Microsoft in 2007.

Warning: The 2.8 MB dotnetfx35setup.exe is the web installer. You do not want that. The full offline file is approximately 230–250 MB.