Why can I not access certain web sites?

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I am unable to connect to only 2 sites (that I am aware of) UNLESS I use a proxy. Using a proxy lets me connect.
THis problem exists on 1 of 2 computers on the same home ADSL network. The bad PC uses Win XP Pro and the good one uses Win2K Pro.

Having the same problem here. It is affecting my laptop and desktop on the same wireless netowrk. The comment above to search google was funny cause thats the site I cant get to (like the others stated above).Someone please help us!!!!!

please can you help me every time i go on ebay it goes straight of and will not let me go on it and goes on a web page and it has got a little hand with a cross on it does this mean i have got a virus

There doesn't seem to be many people helping on this annoying problem. What gets me is you contact the network provider and they are not helpful at all. Any IT boffin please post a suggestion on what to do. Should I delete and re-install my Norton security program?!

Russ

Many XP customers with same problem. Each cured without fail by uninstalling SP2.

If that's true, it's typically due to the increased security settings, both in internet explorer and/or the firewall which is now on by default. SP2 should be installed, period. If it causes websites to become inaccessible, I would investigate the new security settings.

I have a broadband connection access many sites without problems. somes sites e.g Manutd.com, hotels.com, get loaded and then I loose the internet connection. I have called the help desk from pc world, thes suggest I re-set my computer to the factory settings. Any better suggestions than this.

i can connect to all websites apart from msn, ebay and hotmail. I have uninstalled norton and shut all firewalls off and still cant connect. I dont have any updates for windows and still no connection to ebay...

this happened to me about 8 month back and a re-formatted and it was fine. My guess is a hard to find file that blocks secure websites...

Ok here is the answer to your problems:
try and follow along its really not as hard as it looks.

Windows 2000 and XP:

Run the Registry Editor go to run then type REGEDIT on one of your "Client" machines. (this means one of the machines on your network)
Navigate to HKEY_LOCAL_MACHINE\ SYSTEM\ CurrentControlSet\ Services\ Tcpip\ Parameters\ Interfaces.
There should be several subkeys under the Interfaces key; most likely, you'll find three or four. View the contents of each key by clicking, and find the one that corresponds to your primary network adapter;, it will be the one with more values than the other two, and will have an IP address value set to something like maybe 192.168.0.1
Once you've found the correct subkey, create a new DWORD value in it (Edit -> New -> DWORD Value), and name the value MTU.
Double-click the new value, choose the Decimal option, and type the MTU value 1492
Click Ok when you're done - you'll need to restart Windows for this change take effect.
Repeat this for each Client machine on the network.

This will fix the problem and enjoy ebay again and many other websites!

here the windows 98 - ME options:

Windows 98/Me:

Run the Registry Editor (REGEDIT.EXE) on one of your "Client" machines.
Navigate to HKEY_LOCAL_MACHINE\ System\ CurrentControlSet\ Services\ Class\ Net\.
Under that branch, find a key (numbered, such as 0005) that contains has TCP/IP assigned to the DriverDesc value.
Select New from the Edit menu, then String Value, and type MaxMTU for the name of the new value.
Double-click the new value, choose the Decimal option, and type the MTU value determined above.
Click Ok when you're done - you'll need to restart Windows for this change take effect.
Repeat this for each Client machine.

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