Strange problem, slow loads on all browsers, temporarily fixed after clearing cookies

[horseatingweeds]

This is a strange problem that I'm not sure how to approach. All the browsers on this Windows 7 Pro system, since its install, loads certain websites and videos painfully slow. The problem is resolved, temporarily, if I clear cookies on the browser.

At first I assumed the slow websites were misusing cookies in some way, but my laptop, which is running Win 7 Home, doesn't have this problem on the same websites.

Any idea what this might be?

 

[learninmypc]

Any specific time of day or all the time? If its time specific, it could be traffic.
Try a speed test http://www.speakeasy.net/speedtest/
http://www.dslreports.com/stest
http://speedtest.net/

 

[horseatingweeds]

It's not network speed or resources. Firefox might load only a certain website slowly while Opera loads the same site quickly, both consistently. If I clear cookies from Firefox, the offending site/video loads quickly again, for a while.

 

[learninmypc]

Got a link to the website(s)?