The x86-x64 installer covers both 32-bit and 64-bit systems.
to the .NET 4.8 offline installer as a more secure alternative? download dotnetfx45-full-x86-x64.exe offline installer
Unlike the smaller "web installer" (which downloads components on demand), this full package is self-contained. The x86-x64 installer covers both 32-bit and 64-bit systems
Microsoft has for .NET Framework 4.5, 4.5.1, and 4.5.2. The recommended version is .NET Framework 4.8 (still supported). download dotnetfx45-full-x86-x64.exe offline installer