I'm a bit of a novice when it comes to computers so I need some help. As of 11 Nov, I was no longer able to access any secure sites (email, banks etc) on either Safari or Firefox, both of which were the most recent editions. I've not had any problems before. I was a bit lost and I've been looking at all kinds of websites to try and sort out the problem, but to no avail. I was advised to look at disk utility and it said I needed to repair the HD by re-installing using the OS X disk. It's made no difference. I've tried checking the Secure Web Proxy box in System Preferences, but it wont hold. Can you help?