Dialog Boxes - All Windows Properties Boxes like folder option not displaying text

Hi:
I run Win Vista x64 on my laptop, recently I have noticed that all the Windows related Dialog Boxes / Buttons for example while I download a file from the internet and I select a location to save the file, the Save & Cancel button are not visible, so is the case with Advanced properties, Folder Options etc, when I go ahead and restart the system, the problem seems to have solved for sometime. I am not sure whats wrong.. but this is killing me .... Can anyone help ...

Re: Dialog Boxes - All Windows Properties Boxes like folder option not displaying te

Please help as I am not sure how to proceed, would any one want more information like screenshots etc ??