To install Microsoft .NET Framework 4.5 on Windows 7, you must ensure your system is updated to Service Pack 1 (SP1)
, as this is a mandatory requirement. While version 4.5 has reached its end of life, it remains necessary for running specific legacy applications. Prerequisites & Requirements Operating System: Windows 7 Service Pack 1 (32-bit or 64-bit). Processor: 1 GHz or faster. At least 512 MB. Disk Space:
Approximately 850 MB for x86 systems or 2 GB for x64 systems. Installation Steps
For the most reliable experience, especially on older systems with potentially unstable connections, using the Offline Installer is highly recommended.
Si intentas instalar y recibes un error que dice algo como "No se puede instalar porque falta una actualización" o el proceso se revierte, sigue estos pasos: instalar net framework 45 para windows 7 new
El problema: Windows 7 a veces necesita una actualización específica para gestionar los nuevos .NET Frameworks. Esta actualización se llama KB4019990 (para sistemas basados en x64) o similar.
La solución:
Do not rely on the web installer. Your "new" Windows 7 likely has TLS 1.2 disabled by default, so the web installer won't even connect to Microsoft's servers.
Step 1: Download the Prerequisites (on a modern PC) You need to transfer three files via USB to your Windows 7 machine: To install Microsoft
KB4490628 (Search for "Update for Windows 7 for x64-based Systems KB4490628")KB4474419 (This is mandatory)NDP452-KB2901907-x86-x64-AllOS-ENU.exeStep 2: Install in strict order Do not skip this order. Install them one by one, rebooting after each.
Because Microsoft often redirects downloads to the latest version (4.8), finding the specific 4.5 installer can be tricky.
dotNetFx45_Full_x86_x64.exe..exe file and select "Run as Administrator."Causa: Falta el Actualización de la raíz de certificados o el KB2785094.
Solución:
Si necesitas instalar .NET 4.5 en varios equipos o sin interacción:
NDP452-KB2901907-x86-x64-AllOS-ENU.exe /q /norestart
/q = modo silencioso (sin ventanas)/norestart = evita reinicio automáticoSí, en todas las ediciones: Home Basic, Home Premium, Professional, Ultimate y Enterprise (siempre que tengan SP1).
Even after reading this, you might get an error. Here is the map to fix them:
x64 (64-bit) version for 64-bit Windows 7, or x86 for 32-bit.