diff --git a/code/modules/modular_computers/computers/item/modular_computer.dm b/code/modules/modular_computers/computers/item/modular_computer.dm
index 641b4e76d2d..42eaa788915 100644
--- a/code/modules/modular_computers/computers/item/modular_computer.dm
+++ b/code/modules/modular_computers/computers/item/modular_computer.dm
@@ -12,6 +12,7 @@
 	var/last_power_usage = 0
 	var/last_battery_percent = 0							// Used for deciding if battery percentage has chandged
 	var/last_world_time = "00:00"
+	var/list/last_header_icons
 	var/computer_emagged = 0								// Whether the computer is emagged.
 
 	var/base_active_power_usage = 50						// Power usage when the computer is open (screen is active) and can be interacted with. Remember hardware can use power too.
@@ -210,11 +211,9 @@
 		P.ntnet_status = get_ntnet_status()
 		P.computer_emagged = computer_emagged
 
-	if(worldtime2text() != last_world_time)
-		last_world_time = worldtime2text()
-		update_uis()
 
 	handle_power() // Handles all computer power interaction
+	check_update_ui_need()
 
 // Function used by NanoUI's to obtain data for header. All relevant entries begin with "PC_"
 /obj/item/modular_computer/proc/get_header_data()
@@ -388,11 +387,6 @@
 
 	if(battery_module)
 		battery_module.battery.use(power_usage * CELLRATE)
-		var/batery_percent = battery_module.battery.percent()
-
-		if(last_battery_percent != batery_percent) //Let's update UI on percent chandge
-			update_uis()
-			last_battery_percent = batery_percent
 
 	last_power_usage = power_usage
 
@@ -596,4 +590,30 @@
 		if(active_program.NM)
 			nanomanager.update_uis(active_program.NM)
 	else
-		nanomanager.update_uis(src)
\ No newline at end of file
+		nanomanager.update_uis(src)
+
+/obj/item/modular_computer/proc/check_update_ui_need()
+	var/ui_updated_needed = 0
+	if(battery_module)
+		var/batery_percent = battery_module.battery.percent()
+		if(last_battery_percent != batery_percent) //Let's update UI on percent chandge
+			ui_updated_needed = 1
+			last_battery_percent = batery_percent
+
+	if(worldtime2text() != last_world_time)
+		last_world_time = worldtime2text()
+		ui_updated_needed = 1
+
+	if(idle_threads.len)
+		var/list/current_header_icons = list()
+		for(var/datum/computer_file/program/P in idle_threads)
+			if(!P.ui_header)
+				continue
+			current_header_icons[P.type] = P.ui_header
+
+		if (!(last_header_icons.len == current_header_icons.len && !length(last_header_icons^current_header_icons)))
+			last_header_icons = current_header_icons
+			ui_updated_needed = 1
+
+	if(ui_updated_needed)
+		update_uis
\ No newline at end of file