diff --git a/cwriter/writer_windows.go b/cwriter/writer_windows.go
index dd5b10c..7125289 100644
--- a/cwriter/writer_windows.go
+++ b/cwriter/writer_windows.go
@@ -17,26 +17,22 @@
 	procFillConsoleOutputAttribute = kernel32.NewProc("FillConsoleOutputAttribute")
 )
 
-type short int16
-type dword uint32
-type word uint16
-
 type coord struct {
-	x short
-	y short
+	x int16
+	y int16
 }
 
 type smallRect struct {
-	left   short
-	top    short
-	right  short
-	bottom short
+	left   int16
+	top    int16
+	right  int16
+	bottom int16
 }
 
 type consoleScreenBufferInfo struct {
 	size              coord
 	cursorPosition    coord
-	attributes        word
+	attributes        uint16
 	window            smallRect
 	maximumWindowSize coord
 }
@@ -48,17 +44,17 @@
 	var info consoleScreenBufferInfo
 	procGetConsoleScreenBufferInfo.Call(w.fd, uintptr(unsafe.Pointer(&info)))
 
-	for i := 0; i < w.lineCount; i++ {
-		// move the cursor up
-		info.cursorPosition.y--
-		procSetConsoleCursorPosition.Call(w.fd, uintptr(*(*int32)(unsafe.Pointer(&info.cursorPosition))))
-		// clear the line
-		cursor := coord{
-			x: info.window.left,
-			y: info.window.top + info.cursorPosition.y,
-		}
-		var count, dw dword
-		count = dword(info.size.x)
-		procFillConsoleOutputCharacter.Call(w.fd, uintptr(' '), uintptr(count), *(*uintptr)(unsafe.Pointer(&cursor)), uintptr(unsafe.Pointer(&dw)))
+	info.cursorPosition.y -= int16(w.lineCount)
+	if info.cursorPosition.y < 0 {
+		info.cursorPosition.y = 0
 	}
+	procSetConsoleCursorPosition.Call(w.fd, uintptr(uint32(uint16(info.cursorPosition.y))<<16|uint32(uint16(info.cursorPosition.x))))
+
+	// clear the lines
+	cursor := coord{
+		x: info.window.left,
+		y: info.cursorPosition.y,
+	}
+	count := uint32(info.size.x) * uint32(w.lineCount)
+	procFillConsoleOutputCharacter.Call(w.fd, uintptr(' '), uintptr(count), *(*uintptr)(unsafe.Pointer(&cursor)), uintptr(unsafe.Pointer(new(uint32))))
 }