It's hard to tell which of the plethora of advertising now infesting PPRuNe is causing the problems, particularly with IE11, but it's probably those with annoying moving graphics in the main.
But I'm getting really fed up with the freezing and performance issues we're seeing on PPRuNe ever since 'noAds' was ditched.
Even moderators have advised me to install an 'ad blocker', now that the site has become so user-unfriendly.
Why should users be your QA consultants? Perhaps you should check the adverts yourselves, before you inflict them on others!
And no, it isn't my Internet connection which at issue - I have a 'Superfast' fibre to the premises connection.