This symptom occurs when the all below condition is covered.
- [Screen area] in [Display Properties] is set 1024 x 768 pixels or higher.
- [Picture Display] in [Display Properties] is set as [Stretch].
- Pixel height of bitmap is saved in less than 16 pixels.
- Bitmap is saved in 16 bit color.
Microsoft has confirmed this problem.
Refer to the following to solve the problem.
1, Open the bitmap image with [Paint].
2, Click [Stretch/Skew] in [Image] menu.
3, Stretch more than 200 % both horizontal and vertical and save it from [File] menu.
Use above bitmap image.
Microsoft web site: Q269595