.NET Framework 3.5 source check

Context

The feature source may be absent, unreadable or unsuitable for the Windows version.

Checks

1. Check whether the affected PC can open and read the specified source location.
2. Verify the source’s Windows version and presence of the required feature files.

Next action

Use Microsoft’s .NET Framework 3.5 source guidance and ask IT to review the installation source and policy.

Sources

• Microsoft Learn ↗

Checked on 2026-10-27