If it's a blank window then flloew ht e'Blank' link in my signature below. There are 5 steps to fixing that there and usually the 1st one does the trick.
Meanwhile if you prefer you can simply run the MCPR removal tool l;isted under Useful Links at the top of this page.
Thanks a lot, I ran MCPR and it removed it without any problems.
That's good. All the best ;-)