No Chad, as we already covered in your two other threads, the problem is most likely with your computer. Ray is saying the same thing -- "My one computer doesn't work on your website "only", but works everywhere else in the world. My work computer is fine."
*I can't fix your computer for you*.
What I can do is use 3rd party resources to see if NC4x4 is working properly for the average visitor and to test it for speed relative to the rest of the internet. That tells me that NC4x4 is quite fast for a "visitor", faster than every other website that anybody has specifically given me as a comparison. For logged-in users, the site is extremely fast, scoring solidly in the 90s according to Google.
Delete your cookies, wipe your cache. Defrag your HD, make sure your software is up to date. Run a malware checker.
Or give me some specifics to go on.