MS Office 07 Color issue

My microsoft office 2007 was working fine, but now all of a sudden the nice interface colors have gotten messed up.

They been replaced with a dull greyish-white colour, and the windows button [from which open, save and print are acessed] looks like a negative.

The icons also seem distorted, and the background is a dull grey.

I have uninstalled, and reinstalled the 2007 suite, but it still remaind the same.

Can some one please help me solve this problem.
I hate this interface, and want the old one back, but don't konw how.

Many Thanks,

PS-It is the same in powerpoint, word, excel, and all the rest.