Too many uniformed dorks associate the PC with microsoft, fact is that microsoft makes both PC and mac compatible software. Second hand parts in the box are not the fault of either IBM or microsoft, its the problem with the supplier. Viruses are the fault of the user, not microsoft.
All aware persons use an effective regualrly updated virus checker.
Apple has set up its own monopoly by secretive means. Stick with ya yuppie translucent advertisisng company colour mac frank, its only your lack of knowledge that prevented you from sorting out your PC configuration to stop the every day crashes. Any competent person can do it. 2001 PCs are not even good beginners' computers now.