I've lost Internet Access on my Windows XP PC following (I think) installing McAfee QuickClean and rashly cleaning up too much space. My guess is that it has deleted a file which is needed for access. What happens is that the dialling, connecting to the ISP (Tiscali) etc all works, and it seems to accept my user name and password, but then Internet Explorer will not load any websites - it immediately gives one of its standard error messages (can't remember exactly which), with no sign of Internet usage in the little icons in the bottom right of the screen. A very small number of bytes seem to be sent/received initially but that is it.
I've tried installing a CD from a new ISP, which gives me a WinSock initialisation error - not sure if that sheds any light on the problem.
Any suggestions about what can be done to resolve this?