Hello, I am running Firefox 1.0.7 (French version) with SpywareBlaster 3.5.1 under Windows XP SP1 and SpywareBlaster fails to detect Firefox. My "registry.dat" file located in "C:\Documents and Settings\Zoulou\Application Data\Mozilla\" is NOT oversized (it's only 335 octects in size). http://img233.imageshack.us/img233/84/regdatcapture26wz.th.jpg (Click to enlarge). I checked the following page: http://www.javacoolsoftware.info/kb/idx/9/073/article/ and I've been reading many help topics regarding that issue and they all refer to oversized registry.dat file. Since my "registry.dat" file seems to be ok, I did not dare to mess up with this file and/or the Firefox profiles. I must say I'm pretty confused after all I've been reading and I wouldn't like to do anything wrong in Windows or Firefox by moving/renaming files or directories, nor to have multiple copies of the Mozilla folder in C:\ as it was sometimes suggested in what I've been reading. Many thanks in advance for your kind replies. Zoulou.