I recently downloaded "Optifine" for Minecraft from www.minecraftmine.org, and since then, every time I tried to log into any website, a window popped up asking me to enter my "password for the security software" - I thought this was due to me recently uprating my security settings in my virus checker (Trend Micro Titanium Maximum). The download was "powered by iLivid" and wanted to install a load of junk on my PC - I declined them all. However, since then I found my profile got deleted from the forum I run, along with a few other member profiles, plus I've been unable to log into a few other websites I use as they say my password is invalid. Therefore I believe this iLivid install program is installing a key logger in Firefox (the security password box does not pop up in any other browser I have installed - I use them for testing my websites, but Firefox is my default browser). I ran a full system scan using my virus checker, with nothing found apart from a few dodgy cookies, which were deleted. But the pop-up password box still persists in Firefox. The only way I removed it was to completely uninstall Firefox including all saves sites and preferences, and then re-installing Firefox (and now it's not asking me to enter my password anymore - even on sites I haven't visited in ages). I'm now having to go through ALL my accounts to change their passwords (just to be on the safe side). I will also be reporting this to Trend Micro, but as of yet they still don't have a compatible toolbar for Firefox :-(