This code decreases run time of the previous code by at least 90%. It's a huge improvement. on run tell application "System Events" set foregroundApps to (every process whose background only is false) as list repeat with foregroundApp in foregroundApps set appName to name of foregroundApp if exists (window 1 of process appName) then if contents of appName is not "" then repeat with w in every window of foregroundApp if value of attribute "AXMinimized" of w is true then set value of attribute "AXMinimized" of w to false end if end repeat end if end if end repeat end tell end run

Thank you for your help. For anyone interested, here is code that unminimized windows iteratively. on run {input, parameters} set windowNames to {} tell application "System Events" repeat with p in every process repeat with w in every window of p if value of attribute "AXMinimized" of w is true then set value of attribute "AXMinimized" of w to false end if end repeat end repeat end tell windowNames end run