Your security software may be blocking access to those websites. Here
are two typical ways (among many other possibilities) this might happen:
You've unwittingly blocked access to the URLs in question, or your ad
blocker thinks they are advertisements.

---
Leonard Grey
Errare humanum est

Gadget wrote:
> IE7 V7.0.5730.13
> Win XP Pro 2002 SP3
>
> I am having trouble accessing SOME websites on my laptop, regardless of
> which ISP or ADSL connection I use.
>
> My laptop cannot access a suppliers website either at home or using the
> wireless LAN at work, but my desk PC at home and my desk PC at work both can
> access the site.
> Same thing when it comes to Google. I can get to the home page but cannot
> get to the search results page.
>
> The bar at the bottom of the screen shows "Waiting for........." and the
> progress bar gets to 5 green blocks (about 1/2 way) but nothing changes in
> the main window. It just sits there waiting. I can cancel navigation or press
> stop and navigate to somewhere else (e.g. one I know I can get to!) without
> issue, so I know IE7 is still running.
>
> I've tried disabling all the add-ons, running spyware/addware/virus scans,
> reinstalling IE7 having downloaded it on another pc and installing from USB
> memory stick, all to no avail.
>
> I've tried running system restore to about a month ago when everything was
> fine, but it says there were no changes made.
>
> Can anyone suggest what I may have missed or what I can try to get around
> this?