On my old computer, something has messed with Explorer. When I go to log on the internet, some program hijacks it at says I need to download their program
. The virus scans don't pick anything up (I have norton) but it stops it from installing when you click on the window pop-up. The spyware programs also say everything is okay. Firefox runs, so I've re-downloaded IE7 and the security updates. But they didn't seem to help.
Any ideas on how to find this program and kill it?