I'm in trouble

Problem, my PCs System32 is infected by a 'Trojan'. (Using Dad's PC) My AVG anti-spyware said It'd clean it, and remove it in a restart. Now all it does, is start and restart in a loop. Even my Safe-mode is non-functional. I do not know how long till I can become operational once more.
Nothing I could help I don't even know what infected me, I'll play Chrono Trigger,Final Fantasy XIII and Soul Silver while I wait.

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