On my dad's computer, it won't let me do the Windows Update....I tried to and it said

[Error number: 0x80072F76]
The website has encountered a problem and cannot display the page you are trying to view. The options provided below might help you solve the problem
"

I can't remember if I posted this problem or not on here before, but I am not sure what is wrong. He is considered to be the 'administrator' on the computer, but it still won't let me update it. Any ideas on what might be wrong?