We have website and one of our customers complains that when he launches the URL there is a blank popup that appears on his window.
He uses IE 7.
We have tried to reproduce the same behaviour in our local PC's but we are not able to do so. The site opens up perfectly fine in our systems.
We suspect that it could be due to a different Service Pack installed on the customer's PC.
Is there a way we can find out which SP is he running on. What would be the simplest process which we can then pass on to the customer to know which SP is he running on?