Internet options wont open

i try and open internet options in ie7 (tools-internet options) but nothing.
clicking on internet options in the control panel displays the following message:

'There is not enough memory to continue.Quit one or more programs to continue'

i've closed all the processes i could possibly close but still the same message.

vista ultimate 32 bit 4gb ram

most grateful if anybody could point me in the right direction
 
Back