[suave_guy]

system restore shud work in this case....

but before that check for the host files by gng to c:\windows\system32\drivers\etc

here you shud have 5 files in total and in case if you find two files as "hosts" than rename the host files as most probably spywares has created duplictae hosts which prevents you to browse the interent

try to broswe the websites from the address bar of the my computer

try to browse the websites by their ip adresses

try to disable/uninstall firewalls

try these and let us know

ENjoy...