Java and Javascript are lightyears apart! Completely different. And no, he doesnt need to improve his speed. Millions of people have that speed and do just fine. It is something to do with his browser/modem/router.
I never said Java and JavaScript were the same. And Nope, it can't be his modem/router. I assume only his PC has that problem otherwise he'd mention it here that his whole family has the same problem.
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What you should try to do now is clear your browser's cache. If it doesn't resolve the issue.
Here's another possibility is that somehow those two web addresses have been added to the Window's HOSTS file in a manner which stops them from being found.
The HOSTS file can be used for this purpose when you wish to prevent access to malicious or unsavoury websites, but some malware can also put perfectly legitimate websites in there just to frustrate you. The Windows Update website is a common victim of this.
The HOSTS file is here on Windows XP/7: C:\Windows\System32\drivers\etc\
It's simply called 'hosts' or 'HOSTS' (there's no 3-letter extension at the end), and it can be opened, edited and saved with Notepad (right-click, 'Open with...')
If you see in there the two problem web addresses with the numbers 127.0.0.1 at the beginning of each line, delete those two lines and save the file. It should fix the problem.
Let me know if these techniques can't fix the problem.