public void scanViruses() { if (this.powerOn != false) { String dataForScan = ram.read(); cpu.scanForVirus(ram, dataForScan); dataForScan = hdd.read(); cpu.scanForVirus(hdd, dataForScan); if (cdrom.isDiskInserted() == true) { dataForScan = cdrom.read(); cpu.scanForVirus(cdrom, dataForScan); } else { System.out.println("No disk in CDROM"); } } else { System.out.println("Before scan, turn on your PC"); } }