[JzJad]

Strike The first thing //Check your Firefox extensions// if that does nothing, goto add & remove programs in CP and scroll through till you see obvious ad ware or anything that may be suspicious, once found check its installed on date and if the Publisher names is missing or fishy its probably ad ware or bloat ware from something else.

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I suggest doing a system restore to before your browser fucked up (you can save important material onto a USB drive if it's from after the date of the restore point).

No offence, but a restore should be a last resort especially for something so minor