Repairing the XP GUI

I dont know what has messed up my win XP ui. I am suspecting GameXP did it probably, but although i did restore some glitches like images preview not working, filmstrip not working, jpg thumbnails not working, etc there is a number of other issues that i cant fix. Is there a way to repair / restore the windows XP GUI as a whole?

I tried [sfc /scannow] and XP repair install with no results.

Here are some of the glitches i have found so far, i am sure there are more. Highlighted by the red outlines ....

- second color in title bar is off
- background color in top toolbars menu items switching colors abnormaly

(screenshots : http://forum.tweaks.com/forum/Topic218015-7-1.aspx)

I already contacted the GameXP author to provide me with a list of registry alterations their program does but no response yet

(any chance maybe GameXp is also related with that DVD / movie files playing has now some issues such as the monitor going blank reporting off range frequency or the whole desktop moving down the screen and losing the cursor or the bottom of the desktop (including the taskbar) being lost in a black horizontal zone ? .....)