Inernet Explorer question

This may not be the appropriate newsgroup for this question -- if not,
please point me in the right direction.

Here's the problem:

-- IE 7.0
-- WinXP Home Edition with SP3

I use a Netgear WGR614 router with wireless capability.

My desktop is connected to the router via an Ethernet cable.

My daughter connects with the wireless access point on the same router.

I have constant problems with the desktop computer when trying to surf the
'net -- at least one-third of the time when I click on a link, I get a
failure notice "Internet Explorer cannot display the webpage." Most of the
time I can run the connection diagnostic and IE reports that it has restored
connectivity -- I access websites normally for a few minutes, then,
"Internet Explorer cannot display the webpage" -- run diagnostic --
connect -- repeat.

I have been thinking that the problem was with my ISP -- however -- while I
am experiencing failures, my daughter with her laptop connected to the
wireless access point on the router is humming right along, not experiencing
any problems at all.

Anyone have any suggestions??