Subject: XP ICS problem opening most pages in internet explorer

I have a small network of 3 computers all running XP(2 pro, one home).  We 
connect using ADSL which does not use PPoE.  We just recently got issued a 
public IP from our ISP, so I changed our network configuration to use one of 
our windows XP Pro computers (all are Dell Demensions) to work as an internet 
connection sharing host.  The basic setup is DSL modem --> Host Computer --> 
Switch --> Other computers.  On the host computer, the internet connection 
works perfectly -- and it also works fine on the computer running XP Home.  
However, on the other XP pro computer everything should be working fine.  I'm 
networked on the lan, have all access to shared files and printers, obviously 
recieve an IP -- can ping to any server on the internet through the command 
prompt -- Outlook works fine for email access.  However Internet Explorer 
will not open any but a small handful of pages.  Google opens, as does the 
MSN home page.  However no other sites that I have tried open -- they simply 
stall out on the web site found,  waiting for reply message on the status bar 
until after a few minutes brings up 'the page can not be displayed.'   I've 
tried manually setting the lan card speed/duplex mode, looked for new 
drivers, and in desperation reformatted the hard drive and reinstalled 
windows from scratch (we've had the computer for less than 3 weeks, so it 
wasn't as drastic as it could be), yet the problem remains.  I tried dell 
tech support, but because of the 'advanced technical' nature of the problem 
it does not fall under the warranty coverage and they wanted to charge me 
$150 dollars for one-time telephone support.  Please if anyone has any other 
possible ideas, let me know as i've pretty well exhausted my knowledge -- I 
have a great deal of computer background, but networking is one of my weakest 
areas.  Sorry for the eye-strain, I just wanted to be comprehensive.  THANKS!!