IE6 Shutting down some sites..

[jmwills]

Okay this is on my son's machine at school (Gateway 600 XP Pro).

Some websites are shutting down on him as soon as he navigates to them, form what I saw at Christmas, it appears to be Secure Sites (https), but there is no rhyme nor reason to it.

It would seem that if a browser had a set security setting, it would shut down all sites that didn;t fit the profile. I am at my wits end on this one.
Thanks in advanace for any help. By the way, scans with AdAware, Spybot, and CW Shreddrer turned up nothing. Machine is fully updated.

[Vernon Frazee]

May be because of restrictions that are setup on the school's firewall and/or the ISP.

[jmwills]

He is on an independent ISP in his apartment.

[frebo]

i have posted the same post here and other forums no help yet, i have certain sites that i go to they will load and then completely turn ie6 off, i can go to www.radioshack.com and several others and as soon as they load if i have 3 or 4 websites open it kills them all, doesnt do it on myie2 or opera. some one else posted a question just like this also sometime back on the security and viruses forum. no one explained it there either