Hi Vlk,
I did try Firefox as well as IE7 when having the problems described above. Even when using Firefox I couldn't download web pages with the original version of Web Shield, but I believe I could when Web Shield was turned off. With the fix applied, web pages load ok with both IE7 and Firefox.
I am connected to the internet with a Netgear wireless router model number DG834G v3 (UK version). I have loaded the beta Vista drivers from the Netgear site - dg834gv3_10Jan07_vista3_3. Could these drivers be the cause of the problem? My ISP is VirginMedia (used to be called Virgin Net before merger with the cable provider NTL).
Ian