machine salvage after cyber-attack

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http://www.linuxquestions.org – I have a machine on which I was running slackware, mint and archbang when I foolishly strayed into a den of online modern-day ali babas, one of whom shafted me with some kind of virus because of a dispute. Symptoms:constant beeping noise; as i typed text, it was converted into meaningless code; when i inserted partition magic into drive and loaded it, it too was scrambled (the program itself loads into ram; so it is uneffected, being "ro"; any attempt to kernel fails any attempt to get to bios fails Anyone able to help: I just want to fdisk -z it back to basic usability, not at al (HowTos)