I would first of all attempt to get rid of the infection and then follow strawballs advice with a repair install. The Belarc advice is sound anyway.
What AV program have you got? Have you run any Antispyware scans? They often flag up trojans too and remove them. I suggest asquared free click here and Malwarebytes Antimalware click here Run deep scans in both in safe mode and delete all they find.
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