Hi there, I've just received my laptop back from HP after being in repair for three week. I have just tried visiting the website I visit the most, Twitter - with an 'untrusted connection' warning. Come on, this is TWITTER we are talking about, one of the most visited sites on the internet! Anyway, i googled the problem and found this webpage http://kb.mit.edu/confluence/pages/viewpage.action?pageId=4275352 - i downloaded the link provided and by accident i didn't check the tick box like instructed to, and continued to proceed by accident. I now cannot find a way of getting on to twitter or deleting this certificate thing i installed. I would also like to point out that just before i typed this, i got the same warning on this very website when signing up! However this time i just pressed I understand the risks. I've also been into my settings and added a trusted website thing but that didn't work.