I received an update message after my system had installed the newest Firefox 3. something, approximately 4 days ago. (Today is 3/22, so about 3/17--18) The newest update , when started, took me to the Mozilla homepage, where It was suggested I download and comment on the new Firefox 4---I do not normally do this, but am so impressed with Firefox versus most others, that I did, now, I cannot open Firefox at all, the older version, 3. something, is not in my system, only 4, but my system/PC upon trying to open the new Firefox, prompts me over and over to restart the system, (which I have done 3 times) I figured I would then simply remove it, (Firefox 4) and either try it again, or re-install the newest 3. something---I cannot remove it, even using my anti-virus program to do so, it simply prompts over and over to restart, wether I try to open, remove, or access it in any way---I do not wish to use system restore, but that seems my only option, please help!!!