If you are seeing 0x800f0952 specifically while trying to install .NET Framework 3.5, try the manual toggle:
How to Fix Windows Update Error 0x800f0952: A Step-by-Step Guide 0x800f0952 install
Windows has a built-in "doctor" for these exact issues. It’s the easiest place to start. Press to open Settings . Go to System > Troubleshoot > Other troubleshooters . Find Windows Update and click Run . Follow the prompts and restart your computer if requested. Solution 2: Clear the Windows Update Cache If you are seeing 0x800f0952 specifically while trying
Type in your Windows search bar, right-click it, and select Run as Administrator . and select Run as Administrator .