think ive found the answer, its a known issue on this site, this worked for me, so good luck:
Issue:
On some Dell systems, Maya menus are displayed incorrectly. Some sliders or
option boxes are missing.
Solution:
Change the default system font size, restart your system then change it back
(and restart again).
On Windows 2000:
It is in display properties: (right-mouse on desktop -> Properties,
Settings-> Advanced -> General Tab -> Display Font size. )
On Windows XP:
It is in display properties: (right-mouse on desktop -> Properties,
Settings-> Advanced -> General Tab -> Display Font size DPI. )