The problem most definitely has to do with Windows XP and the browser you are using, especially if it's Internet Explorer. It's too old and won't work correctly with certain parts of the net, nor the System Control Center.
You could try something like Firefox, which I can get to work somewhat with XP and System Control Center, but keep in mind that your Windows XP computer is full of security holes and very vulnerable.
Please create a new thread -- adding your issues to another thread may not get the attention of the moderators, as they prefer to help each user individually. You should also stop posting in other sections. Your best bet is to create one post that states your issues and wait for the moderators to respond. They are here M-F from about 9 to 5.
Connections are slow and WiFi doesn't work.
Click the blue button labeled: Start a topic
In the box labeled Subject, give your topic a title
On the right hand side, select one or more labels from "Choose a label."
In the box labeled Body, type your issues as clearly as you can.
When you're done, click Post.
A moderator on this site is a Hughesnet employee. Generally, customers provide support and information to other customers on this site, and the moderators (Hughesnet employees) intervene when we customers can't provide help.