Web pages don't always load, but usually do when refreshed

[£Jim]

Hi,
Click on a Web link and get a page not found error (in IE or Firefox).
Click retry/reload and it usually goes through. System log shows
multiple copies of this message, "Your computer was successfully
assigned an address from the network, and it can now connect to other
computers" although it is asigned an IP by a Windows server on the LAN
with a long expiration.
Known issue? Any fixes?
--

 

[Spirit]

I would flush the DNS cache.

http://www.tech-recipes.com/rx/1600/vista_dns_cache_flush

Possibly an Add-in messing these up.

Start - All Programs - Accessories - System Tools - IE with no Add-ons.

If this works then you have an addin causing the issue. Check TaskManager
also to see what might be running that could be interferring.