I have been sent here from the malware forum, my machine has been checked and is clear of malware.
I run Vista Buisiness on a HP Compaq6710b laptop.
A month ago firefox started having problems - after 5 minutes of browsing it would't load any pages and said "Stopped" down left. And then IE wouldn't load pages either. I noticed that firefox was hanging and I couldn't kill it from the task manager. I changed to google chrome. Chrome stops connecting after aprox. 5-6 hours of browsing, it also hangs in the task manager and can't be killed. The computer then has serious problems shutting down, it might even take 10 min.
I have set my firewall to allow access to all the abovementioned browsers.
I tried a clean install of firefox, removing my profile information, and I also tried downgrading to firefox2, this didn't help either.