Microsoft Net Framework 1.1 Service Pack 1 64-bit Download Extra Quality

: Run the newly created netfx.msi from your folder to install the updated version.

Because .NET 1.1 is obsolete and no longer officially supported on modern versions like Windows 10 or 11, you generally cannot install it through standard installers. Instead, you should use the following official downloads and known workarounds. Official Download Links microsoft net framework 1.1 service pack 1 64-bit download

Developers may need the SDK:

. Applications built for .NET 1.1 are strictly 32-bit and run on 64-bit Windows systems using the (Windows-on-Windows 64-bit) emulation layer. Stack Overflow Direct Download Links (Official) : Run the newly created netfx