When I open firefox, I get an error code saying something along the lines of: "C:/Documents and Settings/User/Application Data/mozilla/firefox/profiles/rg7q7llq.default/prefs.js is corrupt and cannot be accesed. Run Chkdsk to fix this." Well, I've ran Chkdsk twice and it didn't work. Please help. Firefox keeps acting like it's my first time using it and won't install any themes I add. This happened right after I did a virus scan with Kaspersky Internet Security