Run Windows update specifically in the Windows powershell

src/main.rs

@@ -587,7 +587,7 @@ fn run() -> Result<(), Error> {
             execute(
                 &mut report,
                 "Windows update",
-                || powershell.windows_update(run_type),
+                || powershell::Powershell::windows_powershell().windows_update(run_type),
                 config.no_retry(),
             )?;
         }

src/steps/powershell.rs

@@ -32,6 +32,14 @@ impl Powershell {
         Powershell { path, profile }
     }
 
+    #[cfg(windows)]
+    pub fn windows_powershell() -> Self {
+        Powershell {
+            path: which("powershell").filter(|_| !is_dumb()),
+            profile: None,
+        }
+    }
+
     #[cfg(windows)]
     pub fn has_module(powershell: &PathBuf, command: &str) -> bool {
         Command::new(&powershell)