[Percypotter]

I had an installation of Firefox 3.5.5 on my system which (all of a sudden) refused to do anything, I could'nt even scroll up or down the page, or enter any text in the search box, it just froze. I uninstalled this and downloaded another version which is exactly the same. Also, I had a recent installation of Kaspersky anti-virus 2009 which told me that my operating system (XP service pack 3) had changed since the installation of Kaspersky and that I had to reinstall it, which I had to do manually as it would not uninstall from add/remove programs. I reinstalled Kaspersky which went the same way as firefox (totally unresponsive).Everything else on my computer is working fine, including Internet Explorer, has anyone any idea what the problem may be?.

[Rich-M]

Do you use any registry cleaners?
It might be a good idea to run hijackthis and place the log in a post here.
http://download.cnet.com/Trend-Micro...-10227353.html