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Have used Firefox for a long time and now it will not boot up and I get message saying cannot initialize security component. Have uninstalled and re-installed Yahoo optimized 5 version and still the same.

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The only thing I have done different in the past few days is to install trial version of Bitdefender Total Security and I used the PC tune-up feature for PC clean-up and registry cleaner. That seems to be the point I could not loner use Firefox.

The only thing I have done different in the past few days is to install trial version of Bitdefender Total Security and I used the PC tune-up feature for PC clean-up and registry cleaner. That seems to be the point I could not loner use Firefox.