Are you really using WindowsXP?
Your screenshot shows that you are not in Single Window Mode. Tick the Single-Window Mode box.
Might be a good idea to go to Edit -> Preferences -> Windows Management and reset to default values as well. Click on the "Reset Saved Windows...." button and restart Gimp.
![[Image: aGM8ooc.jpg]](https://i.imgur.com/aGM8ooc.jpg)
Your screenshot shows that you are not in Single Window Mode. Tick the Single-Window Mode box.
Might be a good idea to go to Edit -> Preferences -> Windows Management and reset to default values as well. Click on the "Reset Saved Windows...." button and restart Gimp.