HTTP 400 Bad Request

Hello,
I am receving the HTTP 400 Bad Request on my computer when I log into my work website. I can log into my work website without a problem but the problem starts when I click on the link at the top to Claim work for the day.

This is where I receive the error. Another interesting thing is that it only works with my current home internet connection. If I go to a relatives house and my computer without any changes being made to it I can click on the claims link without a problem. It seems to be my internet at home only. I dont get it. I'm completely frustrated. This is the only site it does it on and it does it almost all of the time. Sometimes, however, on my internet connection it will allow me to open the link without a problem but this is not very often. I've done the registry cleaner thing. I use virus scan all the time. I don't get it, any tips and easy ways to fix it? I have turned the friendly HTTP message off under internet options, nothing is working.

Any idiot proof ways to fix the problem?

Any suggestions would be greatly appreciated.