"Open", "My Computer" and IE display delays

When I access "Open", "My Computer" or type in a web
address in to IE, the refresh/display of the contents or
web site is delayed by about 1.5 min.
This is a new (10 days old) machine (Toshiba P20) but
looking at other user groups the problem appears to be
old.
Does anyone have a simple fix. I have updated my Bios,
defraged, renewed the display driver, turned it off and
on, prayed, asked the dog, all to no avail.

Your help would be appreciated.

Mark