diff --git a/kernel/trunk/const.inc b/kernel/trunk/const.inc
index 574a8362b5..7830498c80 100644
--- a/kernel/trunk/const.inc
+++ b/kernel/trunk/const.inc
@@ -234,7 +234,6 @@ MOUSE_SCROLL_V      equ (OS_BASE+0x000FB0E)
 MOUSE_COLOR_MEM     equ (OS_BASE+0x000FB10)
 COLOR_TEMP          equ (OS_BASE+0x000FB30)
 BTN_DOWN            equ (OS_BASE+0x000FB40)
-MOUSE_DOWN          equ (OS_BASE+0x000FB44)
 X_UNDER             equ (OS_BASE+0x000FB4A)
 Y_UNDER             equ (OS_BASE+0x000FB4C)
 
@@ -256,9 +255,6 @@ TASK_ACTIVATE       equ (OS_BASE+0x000FF01)
 REDRAW_BACKGROUND   equ (OS_BASE+0x000FFF0)
 
 BANK_RW             equ (OS_BASE+0x000FFF2)
-MOUSE_BACKGROUND    equ (OS_BASE+0x000FFF4)
-DONT_DRAW_MOUSE     equ (OS_BASE+0x000FFF5)
-;DONT_SWITCH         equ (OS_BASE+0x000FFFF)
 
 TMP_STACK_TOP       equ 0x006CC00
 
diff --git a/kernel/trunk/core/sys32.inc b/kernel/trunk/core/sys32.inc
index 045290e37b..1f3b4837b4 100644
--- a/kernel/trunk/core/sys32.inc
+++ b/kernel/trunk/core/sys32.inc
@@ -675,9 +675,6 @@ terminate: ; terminate application
         xor     esi, esi
         call    redrawscreen
 
-        mov     [MOUSE_BACKGROUND], byte 0; no mouse background
-        mov     [DONT_DRAW_MOUSE], byte 0; draw mouse
-
         call    unlock_application_table
     ;mov   esi,process_terminated
     ;call  sys_msg_board_str
diff --git a/kernel/trunk/gui/window.inc b/kernel/trunk/gui/window.inc
index 10360922ba..aa23575101 100644
--- a/kernel/trunk/gui/window.inc
+++ b/kernel/trunk/gui/window.inc
@@ -992,7 +992,6 @@ waredraw: ;////////////////////////////////////////////////////////////////////
         jz      .do_not_draw
 
         ; yes it is, activate and update screen buffer
-        mov     byte[MOUSE_DOWN], 1
         call    window._.window_activate
 
         pushad
@@ -1025,13 +1024,9 @@ align 4
         ; no it's not, just activate the window
         call    window._.window_activate
         xor     eax, eax
-        mov     byte[MOUSE_BACKGROUND], al
-        mov     byte[DONT_DRAW_MOUSE], al
-        dec     eax
 ;--------------------------------------
 align 4
 .exit:
-        mov     byte[MOUSE_DOWN], 0
         inc     eax
         ret
 ;------------------------------------------------------------------------------
@@ -1184,7 +1179,6 @@ align 4
         add     edx, ebx
         call    ebp
         inc     [_display.mask_seqno]
-        mov     byte[MOUSE_BACKGROUND], 0
 ;--------------------------------------
 align 4
 .exit:
diff --git a/kernel/trunk/kernel.asm b/kernel/trunk/kernel.asm
index 50fce8e205..25e9f67c8e 100644
--- a/kernel/trunk/kernel.asm
+++ b/kernel/trunk/kernel.asm
@@ -2221,11 +2221,6 @@ sysfn_deactivate:         ; 18.1 = DEACTIVATE WINDOW
         lea     esi, [WIN_POS + esi * 2]
         call    window._.window_deactivate
 
-        xor     eax, eax
-        mov     byte[MOUSE_BACKGROUND], al
-        mov     byte[DONT_DRAW_MOUSE], al
-        mov     byte[MOUSE_DOWN], 0
-
         call    syscall_display_settings._.calculate_whole_screen
         call    syscall_display_settings._.redraw_whole_screen
 .nowindowdeactivate:
@@ -3559,7 +3554,6 @@ set_bgr_event:
         mov     [draw_data+32 + RECT.top], eax
         mov     [draw_data+32 + RECT.right], eax
         mov     [draw_data+32 + RECT.bottom], eax
-        mov     [MOUSE_BACKGROUND], byte 0
 ;--------------------------------------
 align 4
 nobackgr: