Now that you have downloaded the file, follow these steps precisely.

After clicking download, a pop-up will list files. You need the runtime package, not the developer pack.
Select:
NDP462-KB3151800-x86-x64-AllOS-ENU.exe (for English)
If you see NDP462-DevPack.exe, that is for developers only – do not use it for end-users.

A: Restart your PC. Then run the app as administrator. If still failing, run the .NET Framework Repair Tool (download from Microsoft separately).


Note: Always download from Microsoft to avoid malicious or tampered installers.

Cause: Corrupt MSI installer cache or a previous .NET installation is damaged.

Fix: Run the .NET Framework Repair Tool (official from Microsoft). Then run the offline installer again.

Do not download installers from third-party sites. Use these official, virus-free Microsoft links:

| Installer Type | File Name | Download Link | | :--- | :--- | :--- | | Offline Installer (Recommended) | NDP462-KB3151800-x86-x64-AllOS-ENU.exe | Download from Microsoft | | Developer Pack (for programmers) | NDP462-DevPack-KB3151934-ENU.exe | Download from Microsoft |

File size: ~62 MB (Offline installer)

Two common issues occur on Windows 7:

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