[CF1] .NET troubleshooting update

Author: deadlypants1973

src/content/docs/cloudflare-one/faq/troubleshooting.mdx

@@ -340,4 +340,23 @@ To resolve this error, review the following options:
 
 When you put your Google Workspace behind Access, users will not be able to log in using Google or Google Workspace as an identity provider.
 
-This configuration creates an authentication loop. Cloudflare Access tries to authenticate the user via Google, but Google itself treats Cloudflare as its identity provider and requires authentication from Cloudflare. Since each system depends on the other to complete login first, the user is caught in an infinite redirect cycle and can never successfully authenticate.
+This configuration creates an authentication loop. Cloudflare Access tries to authenticate the user via Google, but Google itself treats Cloudflare as its identity provider and requires authentication from Cloudflare. Since each system depends on the other to complete login first, the user is caught in an infinite redirect cycle and can never successfully authenticate.
+
+## When installing WARP on Windows, the Setup Wizard ends prematurely.
+
+This issue can occur if the system is missing the [required version](https://developers.cloudflare.com/cloudflare-one/connections/connect-devices/warp/download-warp/#windows:~:text=NET%20Framework%20version-,4.7.2%20or%20later,-HD%20space) of the .NET Framework.
+
+Cloudflare WARP requires at least **.NET Framework Runtime 4.7.2**. Some older versions of Windows do not include this runtime by default, which causes the installer to fail with a `Setup Wizard ended prematurely` error.
+
+This problem typically only affects legacy versions of Windows (such as, Windows 10 Enterprise 1607 LTSB, which is bundled with .NET `4.6`.) More recent Windows versions include .NET `4.7.2` or later by default and do not encounter this error.
+
+To fix this:
+
+1. Download and install the [.NET Framework 4.7.2 Runtime](https://dotnet.microsoft.com/en-us/download/dotnet-framework/net472) (make sure to install the **Runtime**, not the Developer Pack).
+2. Re-run the WARP installer.
+
+If the problem continues, try running the [.NET Repair Tool](https://www.microsoft.com/en-ca/download/details.aspx?id=30135), or check which .NET versions are installed by running the following command in PowerShell:
+
+```powershell
+Get-ChildItem -Path “HKLM:\SOFTWARE\Microsoft\NET Framework Setup\NDP” -Recurse | ForEach-Object { $_.Name; Get-ItemProperty $_.PSPath; "" } 
+```