I have to say, I'm not a fan of Kaspersky. It's an AV (Anti-Virus) that is known to cause some users problems, together with Norton AV, among others.
If you suspect Kaspersky could be causing you problems, you can do no harm by uninstalling it and installing the free MSE (MicroSoft Security Essentials) instead. http://windows.microsoft.com/en-GB/wind ... essentials

I can also confirm that whilst I'm not a fan on DirePox either (Firefox) it does and should work on this forum no problems. Have you updated your Java?