A few questions:
- Have you tried a different browser?
- Have you noticed the rest of the computer slowing down too, or just anything to do with the internet?
- Are you connecting wireless, or wired?
- When you say you tested it, you mean while yours was slow you checked the other machines right?
- Is there anything predictable about it? Like can you set it off manually?
- Have you tried creating a test user to see if the problems persist?
- Do you know you can save money on car insurance by switching to Geico?