Our home has a reasonably fast internet connection, but a while back one of our laptops (running Vista, connecting over wifi) has been suffering from slowed down internet speeds (about 1/3rd of the speed it should have) when everyone else (using wifi and ethernet) has full speed.
I always thought is was a problem with the laptop itself, but after buying a new laptop (different brand, still with Vista) the problem persisted. Could this be a problem with Vista (these laptops are the only machines with Vista)?
None of the other laptops have been suffering from slow internet. What could cause this problem, and how can I fix it?
Edit: Just to clarify, this isn't caused by our ISP throttling us or someone else downloading a large file. Even with the problematic laptop the only turned on computer, its connection is still slow.