nit

CrashCourse.md

@@ -69,6 +69,8 @@ And run like this:
 
 ```powershell
 name_and_age.ps1 -name "Rose" -age "27"
+# or, arguments are also positional!
+name_and_age.ps1 "Rose" "27"
 ```
 
 # functions

update_and_clean.ps1

@@ -14,7 +14,7 @@ If (!(New-Object Security.Principal.WindowsPrincipal $(
     )
   }
   # otherwise just exit.
-  exit
+  Exit-PSHostProcess
 }
 
 Get-WindowsUpdate -AcceptAll -Install