For the last few weeks, every time I try to leave my home page I get a message appear in the middle of my screen saying:
"Windows Internet Explorer
Are you sure you want to leave this page?
Message from webpage
Leave this page
Stay on this page".
Occasionally it pops up when I try to leave Outlook too. I've tried everything I can think of to get rid of it from obvious stuff like system restore to running various anti-malware tools.
Can anybody help, please?